{"id":878,"date":"2017-03-21T14:19:21","date_gmt":"2017-03-21T14:19:21","guid":{"rendered":"http:\/\/bear-hearing.dk\/?page_id=878"},"modified":"2022-03-30T15:14:20","modified_gmt":"2022-03-30T15:14:20","slug":"dorte-hammershoi","status":"publish","type":"page","link":"https:\/\/bear-hearing.dk\/da\/whoweare\/dorte-hammershoi\/","title":{"rendered":"Dorte Hammersh\u00f8i \u2013 Hvem vi er"},"content":{"rendered":"

Hvem vi er<\/h3>\t\t\t
Projektet havde deltagelse af en gruppe dedikerede mennesker, der kom fra audiologiske klinikker, universiteter, teknologisk service, og h\u00f8reapparatindustrien. Det var medicinske audiologer og otologer, ingeni\u00f8rer, konsulenter og audiologop\u00e6der. Nogle unge, andre mere erfarne. Nogle arbejdede p\u00e5 projektet p\u00e5 fuld tid, andre p\u00e5 deltid og med andre forpligtelser. Enkelte havde direkte erfaringer med h\u00f8reneds\u00e6ttelse og rehabilitering.<\/div>\n\t\t<\/div><\/div><\/div>
<\/div><\/div><\/div>
\n\n
\n\t\"Dorte\n<\/div>\n\n<\/div><\/div><\/div>
\n
\n\t

Dorte Hammersh\u00f8i<\/b><\/a><\/div>\r\nProfessor\r\nAalborg Universitet<\/h4>\n<\/div>\n<\/div><\/div><\/div><\/div>

Dorte Hammersh\u00f8i<\/h3>\n
\n\t

Dorte Hammersh\u00f8i er civilingeni\u00f8r i elektronisk systemkonstruktion med specialisering i medikoteknik fra Aalborg Universitet i 1989, og har desuden en Ph.D. grad i akustik fra samme sted 1995. Hun arbejdede kortvarigt som ingeni\u00f8r assistent i industrien under hendes studier, men har siden april 1990 v\u00e6ret ansat ved Aalborg Universitet, som professor siden 2008. Dortes arbejdsfelt er den menneskelige lydopfattelse med s\u00e6rlig reference til elektro-akustiske anvendelser, inkl. audiometri, oto-akustisk emission, h\u00f8reskader, 3D lyd og h\u00f8relse, og m\u00e5ling af st\u00f8jp\u00e5virkning fra \u00f8ren\u00e6re kilder.<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div>

Arbejdsomr\u00e5de<\/h3>\n
\n\t

Dorte Hammersh\u00f8i er BEAR projektleder, og deltager ogs\u00e5 i arbejdet med performance med h\u00f8reapparat<\/a> og med nye strategier for h\u00f8reprofiler og tilpasning<\/a>.<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>

Ressourcer<\/h3>\n
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Publikationer<\/h4>\n
<\/a><\/form>\r\n \r\n \r\n \r\n \r\n \r\n \r\n
\r\n

2024<\/h3>\r\n <\/td>\r\n <\/tr>

Ca\u00f1ete, Oscar M; Loquet, G\u00e9rard; Sanchez-Lopez, Raul; Hougaard, Dan Dupont; Schnack-Petersen, Rikke; Gaihede, Michael; Schmidt, Jesper H; Hammersh\u00f8i, Dorte; Neher, Tobias<\/p>

Auditory Profile-Based Hearing Aid Fitting: Self-Reported Benefit for First-Time Hearing Aid Users<\/a> Journal Article<\/span> <\/p>

Audiological Research, <\/span>14 <\/span>(1), <\/span>pp. 183-195, <\/span>2024<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{AdiolRes2024,
\r\ntitle = {Auditory Profile-Based Hearing Aid Fitting: Self-Reported Benefit for First-Time Hearing Aid Users},
\r\nauthor = {Oscar M Ca\u00f1ete and G\u00e9rard Loquet and Raul Sanchez-Lopez and Dan Dupont Hougaard and Rikke Schnack-Petersen and Michael Gaihede and Jesper H Schmidt and Dorte Hammersh\u00f8i and Tobias Neher},
\r\nurl = {https:\/\/www.mdpi.com\/2039-4349\/14\/1\/17},
\r\ndoi = {10.3390\/audiolres14010017},
\r\nyear = {2024},
\r\ndate = {2024-02-08},
\r\njournal = {Audiological Research},
\r\nvolume = {14},
\r\nnumber = {1},
\r\npages = {183-195},
\r\nabstract = {Background: Although hearing aids (HAs) can compensate for reduced audibility, functional outcomes and benefits vary widely across individuals. As part of the Danish \u2018Better hEAring Rehabilitation\u2019 (BEAR) project, four distinct auditory profiles differing in terms of audiometric thresholds and supra-threshold hearing abilities were recently identified. Additionally, profile-specific HA-fitting strategies were proposed. The aim of the current study was to evaluate the self-reported benefit of these profile-based HA fittings in a group of new HA users. Methods: A total of 205 hearing-impaired older adults were recruited from two Danish university hospitals. Participants were randomly allocated to one of two treatment groups: (1) NAL-NL2 gain prescription combined with default advanced feature settings (\u2018reference fitting\u2019) or (2) auditory profile-based fitting with tailored gain prescription and advanced feature settings (\u2018BEAR fitting\u2019). Two months after treatment, the participants completed the benefit version of the short form of the Speech, Spatial, and Qualities of Hearing Scale (SSQ12-B) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaire. Results: Overall, participants reported a clear benefit from HA treatment. However, no significant differences in the SSQ12-B or IOI-HA scores between the reference and BEAR fittings were found. Conclusion: First-time users experience clear benefits from HA treatment. Auditory profile-based HA fitting warrants further investigation.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Background: Although hearing aids (HAs) can compensate for reduced audibility, functional outcomes and benefits vary widely across individuals. As part of the Danish \u2018Better hEAring Rehabilitation\u2019 (BEAR) project, four distinct auditory profiles differing in terms of audiometric thresholds and supra-threshold hearing abilities were recently identified. Additionally, profile-specific HA-fitting strategies were proposed. The aim of the current study was to evaluate the self-reported benefit of these profile-based HA fittings in a group of new HA users. Methods: A total of 205 hearing-impaired older adults were recruited from two Danish university hospitals. Participants were randomly allocated to one of two treatment groups: (1) NAL-NL2 gain prescription combined with default advanced feature settings (\u2018reference fitting\u2019) or (2) auditory profile-based fitting with tailored gain prescription and advanced feature settings (\u2018BEAR fitting\u2019). Two months after treatment, the participants completed the benefit version of the short form of the Speech, Spatial, and Qualities of Hearing Scale (SSQ12-B) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaire. Results: Overall, participants reported a clear benefit from HA treatment. However, no significant differences in the SSQ12-B or IOI-HA scores between the reference and BEAR fittings were found. Conclusion: First-time users experience clear benefits from HA treatment. Auditory profile-based HA fitting warrants further investigation.<\/div>

Close<\/a><\/p><\/div>

\r\n

2023<\/h3>\r\n <\/td>\r\n <\/tr>

Narayanan, Sreeram Kaithali; Rye, Palle; Houm\u00f8ller, Sabina Storbjerg; Wolff, Anne; Hougaard, Dan Dupont; Gaihede, Michael; Hammersh\u00f8i, Dorte<\/p>

Difference in SII provided by initial fit and NAL-NL2 and its relation to self-reported hearing aid outcomes<\/a> Journal Article<\/span> <\/p>

International Journal of Audiology, <\/span>pp. 1-8, <\/span>2023<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{SKN_SII,
\r\ntitle = {Difference in SII provided by initial fit and NAL-NL2 and its relation to self-reported hearing aid outcomes},
\r\nauthor = {Sreeram Kaithali Narayanan and Palle Rye and Sabina Storbjerg Houm\u00f8ller and Anne Wolff and Dan Dupont Hougaard and Michael Gaihede and Dorte Hammersh\u00f8i},
\r\ndoi = {10.1080\/14992027.2023.2291633},
\r\nyear = {2023},
\r\ndate = {2023-12-19},
\r\njournal = {International Journal of Audiology},
\r\npages = {1-8},
\r\nabstract = {Objective
\r\nThe speech intelligibility index (SII) is used to quantify the audibility of the speech. This study examined the relationship between self-reported hearing aid (HA) outcomes and the difference in aided SII (SIIA) calculated from the initial fit (IF) gain and that prescribed as per the second generation of National Acoustic Laboratory Non-Linear (NAL-NL2).
\r\n
\r\nDesign
\r\nA prospective observational study.
\r\n
\r\nStudy sample
\r\nThe study included 718 first-time and 253 experienced HA users. All users had a valid real-ear measurement (REM) at three input levels (55, 65 and 80\u2009dB SPL).
\r\n
\r\nResults
\r\nThe gain provided by IF was lower than NAL-NL2 at 55 and 65\u2009dB SPL. IF gain exhibited reduced compression than NAL-NL2 as input levels increased from 55 to 80\u2009dB SPL. On average, the SIIA provided by IF was significantly lower than that for NAL-NL2 at all input levels. The difference in SIIA between IF and NAL-NL2 at 80\u2009dB SPL input level with 0\u2009dB signal-to-noise ratio (SNR) turned out to be a predictor for self-reported outcome for first-time HA users.
\r\n
\r\nConclusion
\r\nThe study suggests that an SIIA close to that provided by NAL-NL2 at high input levels would be preferred to obtain a better self-reported outcome.\u2003},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

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Houm\u00f8ller, Sabina Storbjerg; Tsai, Li-Tang; Wolff, Anne; Narayanan, Sreeram Kaithali; Hougaard, Dan Dupont; Gaihede, Michael; Hammersh\u00f8i, Dorte; Godballe, Christian; Schmidt, Jesper Hvass<\/p>

A history of occupational noise exposure is associated with steep-slope audiograms and poorer self-reported hearing-aid outcomes<\/a> Journal Article<\/span> <\/p>

International Journal of Audiology, <\/span>2023<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{sabina_noise,
\r\ntitle = {A history of occupational noise exposure is associated with steep-slope audiograms and poorer self-reported hearing-aid outcomes},
\r\nauthor = {Sabina Storbjerg Houm\u00f8ller and Li-Tang Tsai and Anne Wolff and Sreeram Kaithali Narayanan and Dan Dupont Hougaard and Michael Gaihede and Dorte Hammersh\u00f8i and Christian Godballe and Jesper Hvass Schmidt},
\r\nurl = {https:\/\/doi.org\/10.1080\/14992027.2023.2272558},
\r\ndoi = {10.1080\/14992027.2023.2272558},
\r\nyear = {2023},
\r\ndate = {2023-11-01},
\r\njournal = {International Journal of Audiology},
\r\nabstract = {Objective
\r\nTo investigate the effects of previous occupational noise exposure in older adults with hearing loss on (1) audiometric configuration and acoustic reflex (AR) thresholds and (2) self-reported hearing abilities and hearing aid (HA) effectiveness.
\r\n
\r\nDesign
\r\nA prospective observational study.
\r\n
\r\nStudy sample
\r\nThe study included 1176 adults (\u226560\u2009years) with bilateral sensorineural hearing loss. Pure-tone audiometry, AR thresholds, and responses to the abbreviated version of the Speech, Spatial, and Qualities of Hearing Scale (SSQ12) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaire were obtained, along with information about previous occupational noise exposure.
\r\n
\r\nResults
\r\nGreater occupational noise exposure was associated with a higher prevalence of steeply sloping audiograms in men and women and a 0.32 (95% CI: \u22120.57; \u22120.06) scale points lower mean SSQ12 total score among noise-exposed men. AR thresholds did not show a significant relation to noise-exposure status, but hearing thresholds at a given frequency were related to elevated AR thresholds at the same frequency.
\r\n
\r\nConclusions
\r\nA noise exposure history is linked to steeper audiograms in older adults with hearing loss as well as to poorer self-reported hearing abilities in noise-exposed men. More attention to older adults with previous noise exposure is warranted in hearing rehabilitation.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Objective
\r\nTo investigate the effects of previous occupational noise exposure in older adults with hearing loss on (1) audiometric configuration and acoustic reflex (AR) thresholds and (2) self-reported hearing abilities and hearing aid (HA) effectiveness.
\r\n
\r\nDesign
\r\nA prospective observational study.
\r\n
\r\nStudy sample
\r\nThe study included 1176 adults (\u226560\u2009years) with bilateral sensorineural hearing loss. Pure-tone audiometry, AR thresholds, and responses to the abbreviated version of the Speech, Spatial, and Qualities of Hearing Scale (SSQ12) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaire were obtained, along with information about previous occupational noise exposure.
\r\n
\r\nResults
\r\nGreater occupational noise exposure was associated with a higher prevalence of steeply sloping audiograms in men and women and a 0.32 (95% CI: \u22120.57; \u22120.06) scale points lower mean SSQ12 total score among noise-exposed men. AR thresholds did not show a significant relation to noise-exposure status, but hearing thresholds at a given frequency were related to elevated AR thresholds at the same frequency.
\r\n
\r\nConclusions
\r\nA noise exposure history is linked to steeper audiograms in older adults with hearing loss as well as to poorer self-reported hearing abilities in noise-exposed men. More attention to older adults with previous noise exposure is warranted in hearing rehabilitation.<\/div>

Close<\/a><\/p><\/div>

Narayanan, Sreeram Kaithali; Houm\u00f8ller, Sabina Storbjerg; Wolff, Anne; Hougaard, Dan Dupont; Gaihede, Michael; Schmidt, Jesper Hvass; Hammersh\u00f8i, Dorte<\/p>

Adapting to New Hearing Aids and Hearing Aid Adjustments in Adult Danish Users<\/a> Journal Article<\/span> <\/p>

American Journal of Audiology, <\/span>32 <\/span>(3), <\/span>pp. 526-542, <\/span>2023<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{skn_aja,
\r\ntitle = {Adapting to New Hearing Aids and Hearing Aid Adjustments in Adult Danish Users},
\r\nauthor = {Sreeram Kaithali Narayanan and Sabina Storbjerg Houm\u00f8ller and Anne Wolff and Dan Dupont Hougaard and Michael Gaihede and Jesper Hvass Schmidt and Dorte Hammersh\u00f8i},
\r\nurl = {https:\/\/doi.org\/10.1044\/2023_AJA-23-00030},
\r\ndoi = {10.1044\/2023_AJA-23-00030},
\r\nyear = {2023},
\r\ndate = {2023-07-14},
\r\njournal = {American Journal of Audiology},
\r\nvolume = {32},
\r\nnumber = {3},
\r\npages = {526-542},
\r\nabstract = {Purpose: This study was aimed at understanding the effect of time taken to adapt to the new hearing aids (HAs) and the timeline of HA adjustments performed over more than a year of rehabilitation on self-reported HA outcomes.
\r\nMethod: A self-report of the time it took to get accustomed to the new HAs and adjustment of the HAs during a year of rehabilitation collected from 690 HA users using a nonstandardized questionnaire were analyzed. The abbreviated version of the Speech, Spatial, and Quality of Hearing questionnaire and the International Outcome Inventory for Hearing Aids were used as the self-reported HA outcome.
\r\nResult: Out of 690 participants, 442 (64%) got accustomed to HAs within 2 months. Ninety-one participants (13%) did not get accustomed to the HAs at all, out of which 74 (81%) were first-time HA users. Eighty-four participants (12%) did not receive any HA adjustments after their initial fitting, and 49 (7%) had their HAs adjusted four or more times during the 1 year of rehabilitation. Three hundred ninety (57%) participants got their HA adjusted only at the 2-month follow-up visit, showing the intent to adjust given an opportunity. The stepwise multiple linear regression results showed the significant impact of getting accustomed to the HA and having HA adjusted at multiple instances on the self-reported HA outcomes.
\r\nConclusion: This study showed the importance of getting accustomed to the HA and having a minimal number of adjustments to have a better long-term self-reported HA outcome.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Purpose: This study was aimed at understanding the effect of time taken to adapt to the new hearing aids (HAs) and the timeline of HA adjustments performed over more than a year of rehabilitation on self-reported HA outcomes.
\r\nMethod: A self-report of the time it took to get accustomed to the new HAs and adjustment of the HAs during a year of rehabilitation collected from 690 HA users using a nonstandardized questionnaire were analyzed. The abbreviated version of the Speech, Spatial, and Quality of Hearing questionnaire and the International Outcome Inventory for Hearing Aids were used as the self-reported HA outcome.
\r\nResult: Out of 690 participants, 442 (64%) got accustomed to HAs within 2 months. Ninety-one participants (13%) did not get accustomed to the HAs at all, out of which 74 (81%) were first-time HA users. Eighty-four participants (12%) did not receive any HA adjustments after their initial fitting, and 49 (7%) had their HAs adjusted four or more times during the 1 year of rehabilitation. Three hundred ninety (57%) participants got their HA adjusted only at the 2-month follow-up visit, showing the intent to adjust given an opportunity. The stepwise multiple linear regression results showed the significant impact of getting accustomed to the HA and having HA adjusted at multiple instances on the self-reported HA outcomes.
\r\nConclusion: This study showed the importance of getting accustomed to the HA and having a minimal number of adjustments to have a better long-term self-reported HA outcome.<\/div>

Close<\/a><\/p><\/div>

Wolff, Anne; Houm\u00f8ller, Sabina Storbjerg; Tsai, Li-Tang; Hougaard, Dan Dupont; Gaihede, Michael; Hammersh\u00f8i, Dorte; Schmidt, Jesper Hvass<\/p>

The effect of hearing aid treatment on health-related quality of life in older adults with hearing loss<\/a> Journal Article<\/span> <\/p>

International Journal of Audiology, <\/span>63 <\/span>(7), <\/span>pp. 500-509, <\/span>2023<\/span>.<\/p>

Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

Lund, Katja; Ordo\u00f1ez, Rodrigo; Nielsen, Jens Bo; Christiansen, Stine; Houm\u00f8ller, Sabina Storbjerg; Schmidt, Jesper Hvass; Gaihede, Michael; Hammersh\u00f8i, Dorte<\/p>

Value Propositions of Public Adult Hearing Rehabilitation in Denmark<\/a> Journal Article<\/span> <\/p>

Audiological Research, <\/span>13 <\/span>(2), <\/span>pp. 254-270, <\/span>2023<\/span>.<\/p>

Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

Narayanan, Sreeram Kaithali; Houm\u00f8ller, Sabina Storbjerg; Wolff, Anne; Lund, Katja; M\u00f6ller, S\u00f6ren; Hougaard, Dan Dupont; Gaihede, Michael; Schmidt, Jesper Hvass; Hammersh\u00f8i, Dorte<\/p>

Self-Reported Hearing-Aid Use Patterns in an Adult Danish Population<\/a> Journal Article<\/span> <\/p>

Audiological Research, <\/span>13 <\/span>(2), <\/span>pp. 221-235, <\/span>2023<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{AR2023SKN,
\r\ntitle = {Self-Reported Hearing-Aid Use Patterns in an Adult Danish Population},
\r\nauthor = {Sreeram Kaithali Narayanan and Sabina Storbjerg Houm\u00f8ller and Anne Wolff and Katja Lund and S\u00f6ren M\u00f6ller and Dan Dupont Hougaard and Michael Gaihede and Jesper Hvass Schmidt and Dorte Hammersh\u00f8i},
\r\nurl = {https:\/\/doi.org\/10.3390\/audiolres13020021},
\r\ndoi = {10.3390\/audiolres13020021},
\r\nyear = {2023},
\r\ndate = {2023-03-27},
\r\njournal = {Audiological Research},
\r\nvolume = {13},
\r\nnumber = {2},
\r\npages = {221-235},
\r\nabstract = {The retrospective reporting of users\u2019 hearing aid (HA) usage can provide insight into individualized HA usage patterns. Understanding these HA usage patterns can help to provide a tailored solution to meet the usage needs of HA users. This study aims to understand the HA usage pattern in daily-life situations from self-reported data and to examine its relationship to self-reported outcomes. A total of 1537 participants who responded to questions related to situations where they always took off or put on the HAs were included in the study. A latent class analysis was performed to stratify the HA users according to their HA usage pattern. The results showed distinct usage patterns in the latent classes derived for both scenarios. The demographics, socio-economic indicators, hearing loss, and user-related factors were found to impact HA usage. The results showed that the HA users who reported using the HAs all the time (regular users) had better self-reported HA outcomes than situational users, situational non-users, and non-users. The study explained the underlying distinct HA usage pattern from self-reported questionnaires using latent class analysis. The results emphasized the importance of regular use of HAs for a better self-reported HA outcome},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

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\r\n

2022<\/h3>\r\n <\/td>\r\n <\/tr>

Rye, Palle; Andersen, Rasmus Overgaard; Ravn, Gert; Hammersh\u00f8i, Dorte<\/p>

Comparison of Speech Reception Thresholds for Diotic, Dichotic and Antiphasic Headphone Presentations of Digits-in-Noise Triplets using Dantale I Material<\/a> Inproceedings<\/span> <\/p>

Oral presentation at the Joint Euroregio Baltic Nordic Acoustics Meeting, Aalborg, Denmark, <\/span>2022<\/span>.<\/p>

Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

Narayanan, Sreeram Kaithali; Rye, Palle; Piechowiak, Tobias; Ravn, Gert; Wolff, Anne; Houm\u00f8ller, Sabina Storbjerg; Schmidt, Jesper Hvass; Hammersh\u00f8i, Dorte<\/p>

Can real-ear insertion gain deviations from generic fitting prescriptions predict self-reported outcomes?<\/a> Journal Article<\/span> <\/p>

The International Journal of Audiology, <\/span>62 <\/span>(5), <\/span>pp. 433-441, <\/span>2022<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{TIJA_SKN_J1,
\r\ntitle = {Can real-ear insertion gain deviations from generic fitting prescriptions predict self-reported outcomes?},
\r\nauthor = {Sreeram Kaithali Narayanan and Palle Rye and Tobias Piechowiak and Gert Ravn and Anne Wolff and Sabina Storbjerg Houm\u00f8ller and Jesper Hvass Schmidt and Dorte Hammersh\u00f8i},
\r\nurl = {https:\/\/doi.org\/10.1080\/14992027.2022.2053594},
\r\ndoi = {10.1080\/14992027.2022.2053594},
\r\nyear = {2022},
\r\ndate = {2022-04-07},
\r\njournal = {The International Journal of Audiology},
\r\nvolume = {62},
\r\nnumber = {5},
\r\npages = {433-441},
\r\nabstract = {Objective
\r\nThe aim of this study was to determine whether the differences in insertion gains from the first fit to generic prescriptions of hearing aids can predict the self-reported hearing aid (HA) outcomes for first-time and experienced HA users.
\r\n
\r\nDesign
\r\nThis was a prospective observational study.
\r\n
\r\nStudy Sample
\r\nThe study included 885 first-time and 330 experienced HA users with a valid real-ear measurement on both ears and answers to the abbreviated version of the Speech, Spatial, and Quality of Hearing (SSQ12) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaires.
\r\n
\r\nResults
\r\nK-means clustering of gain differences between individual real-ear insertion gain to three generic gain prescriptions (NAL-NL2, NAL-RP, and one-third gain rules) was performed. The gain difference at higher frequencies generally differentiated the clusters. The experienced users in the cluster with fittings closest to NAL-NL2 and NAL-RP prescription were found to exhibit a higher IOI-HA Factor 1 score (representing the overall benefit of the hearing aid use). The gain differences to generic prescription did not affect other self-reported outcomes for first-time and experienced HA users.
\r\n
\r\nConclusion
\r\nThe experienced HA users with minimal gain deviations from generic prescriptions reported better self-perceived benefits than users with larger deviations. However, this was not apparent in first-time users.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Objective
\r\nThe aim of this study was to determine whether the differences in insertion gains from the first fit to generic prescriptions of hearing aids can predict the self-reported hearing aid (HA) outcomes for first-time and experienced HA users.
\r\n
\r\nDesign
\r\nThis was a prospective observational study.
\r\n
\r\nStudy Sample
\r\nThe study included 885 first-time and 330 experienced HA users with a valid real-ear measurement on both ears and answers to the abbreviated version of the Speech, Spatial, and Quality of Hearing (SSQ12) and the International Outcome Inventory for Hearing Aids (IOI-HA) questionnaires.
\r\n
\r\nResults
\r\nK-means clustering of gain differences between individual real-ear insertion gain to three generic gain prescriptions (NAL-NL2, NAL-RP, and one-third gain rules) was performed. The gain difference at higher frequencies generally differentiated the clusters. The experienced users in the cluster with fittings closest to NAL-NL2 and NAL-RP prescription were found to exhibit a higher IOI-HA Factor 1 score (representing the overall benefit of the hearing aid use). The gain differences to generic prescription did not affect other self-reported outcomes for first-time and experienced HA users.
\r\n
\r\nConclusion
\r\nThe experienced HA users with minimal gain deviations from generic prescriptions reported better self-perceived benefits than users with larger deviations. However, this was not apparent in first-time users.<\/div>

Close<\/a><\/p><\/div>

\r\n

2021<\/h3>\r\n <\/td>\r\n <\/tr>

Houm\u00f8ller, Sabina Storbjerg; Wolff, Anne; Narne, Vijaya K; Narayanan, Sreeram Kaithali; Godballe, Christian; Hougaard, Dan Dupont; Loquet, G\u00e9rard; Gaihede, Michael L; Hammersh\u00f8i, Dorte; Schmidt, Jesper Hvass<\/p>

Prediction of successful hearing aid treatment in first-time and experienced hearing aid users: Using the International Outcome Inventory for Hearing Aids<\/a> Journal Article<\/span> <\/p>

International Journal of Audiology, <\/span>pp. 1-11, <\/span>2021<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{doi:10.1080\/14992027.2021.1916632,
\r\ntitle = {Prediction of successful hearing aid treatment in first-time and experienced hearing aid users: Using the International Outcome Inventory for Hearing Aids},
\r\nauthor = {Sabina Storbjerg Houm\u00f8ller and Anne Wolff and Vijaya K. Narne and Sreeram Kaithali Narayanan and Christian Godballe and Dan Dupont Hougaard and G\u00e9rard Loquet and Michael L Gaihede and Dorte Hammersh\u00f8i and Jesper Hvass Schmidt},
\r\nurl = {https:\/\/doi.org\/10.1080\/14992027.2021.1916632},
\r\ndoi = {10.1080\/14992027.2021.1916632},
\r\nyear = {2021},
\r\ndate = {2021-05-25},
\r\njournal = {International Journal of Audiology},
\r\npages = {1-11},
\r\nabstract = {Objective: Primarily to understand whether clinically relevant factors affect the International Outcome Inventory (IOI-HA) scores and to examine if IOI-HA scores improve when renewing the hearing aids (HA) for experienced users. Secondly, to estimate the overall HA effectiveness using the IOI-HA.
\r\n
\r\nDesign: A prospective observational study.
\r\n
\r\nStudy sample: In total, 1961 patients with hearing loss were included. All patients underwent a hearing examination, were fitted with HAs, and answered the IOI-HA. Factor analysis of IOI-HA separated the items into a Factor 1 (use of HA, perceived benefits, satisfaction, and quality of life) and Factor 2 (residual activity limitation, residual participation restriction and impact on others) score.
\r\n
\r\nResults: Degree of hearing loss, word recognition score, motivation, HA usage time, tinnitus, asymmetry, and sex were significantly associated with total IOI-HA, Factor 1, or Factor 2 scores. The seven IOI-HA items increased on average by 0.4 (p < 0.001) when renewing HAs. The total median IOI-HA score at follow-up was 29 (7) for experienced (n = 460) and first-time users (n = 1189), respectively.
\r\n
\r\nConclusions: Degree of hearing loss, word recognition score, motivation, tinnitus, asymmetry, and sex may be used to identify patients who require special attention to become successful HA users.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Objective: Primarily to understand whether clinically relevant factors affect the International Outcome Inventory (IOI-HA) scores and to examine if IOI-HA scores improve when renewing the hearing aids (HA) for experienced users. Secondly, to estimate the overall HA effectiveness using the IOI-HA.
\r\n
\r\nDesign: A prospective observational study.
\r\n
\r\nStudy sample: In total, 1961 patients with hearing loss were included. All patients underwent a hearing examination, were fitted with HAs, and answered the IOI-HA. Factor analysis of IOI-HA separated the items into a Factor 1 (use of HA, perceived benefits, satisfaction, and quality of life) and Factor 2 (residual activity limitation, residual participation restriction and impact on others) score.
\r\n
\r\nResults: Degree of hearing loss, word recognition score, motivation, HA usage time, tinnitus, asymmetry, and sex were significantly associated with total IOI-HA, Factor 1, or Factor 2 scores. The seven IOI-HA items increased on average by 0.4 (p < 0.001) when renewing HAs. The total median IOI-HA score at follow-up was 29 (7) for experienced (n = 460) and first-time users (n = 1189), respectively.
\r\n
\r\nConclusions: Degree of hearing loss, word recognition score, motivation, tinnitus, asymmetry, and sex may be used to identify patients who require special attention to become successful HA users.<\/div>

Close<\/a><\/p><\/div>

Rye, Palle; Narayanan, Sreeram Kaithali; Hammersh\u00f8i, Dorte<\/p>

Effects of Intermittent Noise on Real Ear Measurements in Hearing Aid Fitting<\/a> Inproceedings<\/span> <\/p>

Poster presentation at Baltic Nordic Acoustics Meeting, 3-5 May 2021, Oslo, Norway (online), <\/span>pp. 1\u20136, <\/span>NAA (Nordic Acoustical Association), <\/span>2021<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{PR_BNAM2021,
\r\ntitle = {Effects of Intermittent Noise on Real Ear Measurements in Hearing Aid Fitting},
\r\nauthor = {Palle Rye and Sreeram Kaithali Narayanan and Dorte Hammersh\u00f8i},
\r\nurl = {http:\/\/www.norskakustiskselskap.org\/wp-content\/uploads\/2021\/10\/BNAM_2021_Effects_of_Intermittent_Noise_on_Real_Ear_Measurements_in_Hearing_Aid_Fitting-31-28-Rye-Palle.pdf},
\r\nyear = {2021},
\r\ndate = {2021-05-03},
\r\nbooktitle = {Poster presentation at Baltic Nordic Acoustics Meeting, 3-5 May 2021, Oslo, Norway (online)},
\r\npages = {1--6},
\r\npublisher = {NAA (Nordic Acoustical Association)},
\r\nabstract = {When fitting a hearing aid, real ear measurements (REM) can prove a valuable tool for adjusting the gain of the hearing aid. In REM a probe microphone is inserted into the ear canal carefully placing the probe microphone tip a few millimeters from the tympanic membrane. Typically a reference microphone is present outside the ear canal near the pinna. Proper calibration before the REM measurement ensures a flat response of the probe microphone when placing the tip at the same positions as the reference microphone.
\r\nThe real ear unaided gain (REUG) is measured as the level difference between the reference microphone and the probe microphone placed near the tympanic membrane. Inserting the hearing aid the real ear aided gain (REAG) can be measured similarly and the real ear insertion gain (REIG) is calculated as the difference between the REAG and the REUG. Fitting a hearing aid typically involves matching the hearing aid gain to match a REIG prescription target derived by the patients audiogram and occasionally other diagnostic data. To ensure matching the REIG to the prescription target care must be taken to ensure accuracy in the REM measurements.
\r\nInspecting a database of thousands of clinically recorded REM a handful of anomalies were detected and the present study seek to reproduce the observed effects under controlled laboratory conditions. The study involves measuring REM using manikins as well as human subjects. A semi-automated test setup was developed to synchronise the measurement equipment and the noise disturbance in order to investigate the effects of different types of intermittent noise on REM. Preliminary results indicate that intermittent noise burst even shorter than 1s in duration can cause detrimental effects on the real ear measurement.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

When fitting a hearing aid, real ear measurements (REM) can prove a valuable tool for adjusting the gain of the hearing aid. In REM a probe microphone is inserted into the ear canal carefully placing the probe microphone tip a few millimeters from the tympanic membrane. Typically a reference microphone is present outside the ear canal near the pinna. Proper calibration before the REM measurement ensures a flat response of the probe microphone when placing the tip at the same positions as the reference microphone.
\r\nThe real ear unaided gain (REUG) is measured as the level difference between the reference microphone and the probe microphone placed near the tympanic membrane. Inserting the hearing aid the real ear aided gain (REAG) can be measured similarly and the real ear insertion gain (REIG) is calculated as the difference between the REAG and the REUG. Fitting a hearing aid typically involves matching the hearing aid gain to match a REIG prescription target derived by the patients audiogram and occasionally other diagnostic data. To ensure matching the REIG to the prescription target care must be taken to ensure accuracy in the REM measurements.
\r\nInspecting a database of thousands of clinically recorded REM a handful of anomalies were detected and the present study seek to reproduce the observed effects under controlled laboratory conditions. The study involves measuring REM using manikins as well as human subjects. A semi-automated test setup was developed to synchronise the measurement equipment and the noise disturbance in order to investigate the effects of different types of intermittent noise on REM. Preliminary results indicate that intermittent noise burst even shorter than 1s in duration can cause detrimental effects on the real ear measurement.<\/div>

Close<\/a><\/p><\/div>

Hammersh\u00f8i, Dorte<\/p>

Better hearing rehabilitation for adult first-time users (the BEAR project)<\/a> Inproceedings<\/span> <\/p>

Invitede lecture at Baltic Nordic Acoustics Meeting, 3-5 May 2021, Oslo, Norway (online), <\/span>pp. 1\u20137, <\/span>NAA (Nordic Acoustic Association) <\/span>2021<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{DH_BNAM2021_invited,
\r\ntitle = {Better hearing rehabilitation for adult first-time users (the BEAR project)},
\r\nauthor = {Dorte Hammersh\u00f8i},
\r\nurl = {http:\/\/www.norskakustiskselskap.org\/wp-content\/uploads\/2021\/10\/Hammershoi_invited_BNAM2021_v2-12-15-Hammershoi-Dorte.pdf},
\r\nyear = {2021},
\r\ndate = {2021-05-03},
\r\nbooktitle = {Invitede lecture at Baltic Nordic Acoustics Meeting, 3-5 May 2021, Oslo, Norway (online)},
\r\npages = {1--7},
\r\norganization = {NAA (Nordic Acoustic Association)},
\r\nabstract = {First-time adult hearing-aids users do not always experience the debut with success, and it is known that some give up. For the professional fitting the hearing aid, it is often a difficult to figure out, if the hearing aid is poorly fitted to the individual, and whether it is set for best performance or not. The purpose of the BEAR project is to develop a stronger framework for the diagnostics, fitting and assessment of the aided performance that will allow for a more structured, and personalized approach. The project includes several scientific efforts, incl. 1) the collection of data for almost 2.000 patients fitted according to current practice, 2) the development and assessment of new diagnostics for profiling and fitting strategies, as well as 3) development and assessment of methods for measurement of the aided performance. The on-going work includes a proposal for a differentiated fitting based on extended auditory profiles, and is accompanied by both in- and out-of-clinic options for testing and\/or reporting on the aided performance experience. Future results will include an experimental validation of the proposed differentiated fitting, as well as separate efforts to investigating common denominators for patients with poor compensation benefits, and options for out-of-clinic application of the proposed methods.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

First-time adult hearing-aids users do not always experience the debut with success, and it is known that some give up. For the professional fitting the hearing aid, it is often a difficult to figure out, if the hearing aid is poorly fitted to the individual, and whether it is set for best performance or not. The purpose of the BEAR project is to develop a stronger framework for the diagnostics, fitting and assessment of the aided performance that will allow for a more structured, and personalized approach. The project includes several scientific efforts, incl. 1) the collection of data for almost 2.000 patients fitted according to current practice, 2) the development and assessment of new diagnostics for profiling and fitting strategies, as well as 3) development and assessment of methods for measurement of the aided performance. The on-going work includes a proposal for a differentiated fitting based on extended auditory profiles, and is accompanied by both in- and out-of-clinic options for testing and\/or reporting on the aided performance experience. Future results will include an experimental validation of the proposed differentiated fitting, as well as separate efforts to investigating common denominators for patients with poor compensation benefits, and options for out-of-clinic application of the proposed methods.<\/div>

Close<\/a><\/p><\/div>

Narne, Vijaya K; M\u00f6ller, S\u00f6ren; Wolff, Anne; Houm\u00f8ller, Sabina S; Loquet, G\u00e9rard; Hammersh\u00f8i, Dorte; Schmidt, Jesper H<\/p>

Confidence Limits of Word Identification Scores Derived Using Nonlinear Quantile Regression<\/a> Journal Article<\/span> <\/p>

Trends in Hearing, <\/span>25 <\/span>, pp. 1-9, <\/span>2021<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@article{doi:10.1177\/2331216520983110,
\r\ntitle = {Confidence Limits of Word Identification Scores Derived Using Nonlinear Quantile Regression},
\r\nauthor = {Vijaya K Narne and S\u00f6ren M\u00f6ller and Anne Wolff and Sabina S Houm\u00f8ller and G\u00e9rard Loquet and Dorte Hammersh\u00f8i and Jesper H Schmidt},
\r\nurl = {https:\/\/doi.org\/10.1177%2F2331216520983110},
\r\ndoi = {10.1177\/2331216520983110},
\r\nyear = {2021},
\r\ndate = {2021-01-25},
\r\njournal = {Trends in Hearing},
\r\nvolume = {25},
\r\npages = {1-9},
\r\nabstract = {The relation between degree of sensorineural hearing loss and maximum speech identification scores (PBmax) is commonly used in audiological diagnosis and rehabilitation. It is important to consider the relation between the degree of hearing loss and the lower boundary of PBmax, as the PBmax varies largely between subjects at a given degree of hearing loss. The present study determines the lower boundary by estimating the lower limit of the one-tailed 95% confidence limit (CL) for a Dantale I, word list, in a large group of young and older subjects with primarily sensorineural hearing loss. PBmax scores were measured using Dantale I, at 30\u2009dB above the speech reception threshold or at the most comfortable level from 1,961 subjects with a wide range of pure-tone averages. A nonlinear quantile regression approach was applied to determine the lower boundary (95% CL) of PBmax scores. At a specific pure-tone average, if the measured PBmax is poorer than the lower boundary (95% CL) of PBmax, it may be considered disproportionately poor.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {article}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

\r\n

2020<\/h3>\r\n <\/td>\r\n <\/tr>

Lund, Katja; Ordo\u00f1ez, Rodrigo; Nielsen, Jens Bo; Hammersh\u00f8i, Dorte<\/p>

\u201cYes, I have experienced that!\u201d \u2013 How daily life experiences may be harvested from new hearing aid users<\/a> Inproceedings<\/span> <\/p>

Kressner, Abigail Anne; Regev, Jonathan; Christensen-Dalsgaard, Jakob; Tranebj\u00e6rg, Lisbeth; Santurette, S\u00e9bastien; Dau, Torsten (Ed.): Proceedings of the International Symposium on Audiogory and Audiological Research, <\/span>pp. 381-388, <\/span>2020<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{ISAAR2019Klu_print,
\r\ntitle = {\u201cYes, I have experienced that!\u201d \u2013 How daily life experiences may be harvested from new hearing aid users},
\r\nauthor = {Katja Lund and Rodrigo Ordo\u00f1ez and Jens Bo Nielsen and Dorte Hammersh\u00f8i},
\r\neditor = {Abigail Anne Kressner and Jonathan Regev and Jakob Christensen-Dalsgaard and Lisbeth Tranebj\u00e6rg and S\u00e9bastien Santurette and Torsten Dau },
\r\nurl = {https:\/\/proceedings.isaar.eu\/index.php\/isaarproc\/article\/view\/2019-44},
\r\nyear = {2020},
\r\ndate = {2020-05-01},
\r\nbooktitle = {Proceedings of the International Symposium on Audiogory and Audiological Research},
\r\nvolume = {7},
\r\npages = {381-388},
\r\nabstract = {Both auditory and non-auditory aspects of the rehabilitation process play a role in successful hearing aid uptake. The sound may be experienced differently in the clinic compared to daily life and the skills and knowledge related to HA use vary from patient to patient. The aim of the present study is to assess daily life experiences of new hearing aid users and to explore ways to utilize these assessments in a follow-up situation. The approach is based on online reporting, where the patients over a period of two months \u201cswipe\u201d through 453 possible experiences related to HA use. Seventeen patients volunteered to register experiences for a period of two months, and participated in a follow-up interview, where the registered data were presented. Results suggest that data can shed light on the development within various categories of hearing aid experience and promote reflection on the hearing rehabilitation process.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Hammersh\u00f8i, Dorte; Wolff, Anne; Andersen, Lykke Junker; Mortensen, Rikke Louise; Nielsen, Mads Dalsgaard; Larsen, Stefanie Aagard Skov<\/p>

A word elicitation study including the development of scales characterizing aided listening experience<\/a> Inproceedings<\/span> <\/p>

Kressner, Abigail Anne; Regev, Jonathan; Christensen-Dalsgaard, Jakob; Tranebj\u00e6rg, Lisbeth; Santurette, S\u00e9bastien; Dau, Torsten (Ed.): Proceedings of the International Symposium on Audiogory and Audiological Research, <\/span>pp. 297-304, <\/span>2020<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{ISAARPDP780print,
\r\ntitle = {A word elicitation study including the development of scales characterizing aided listening experience},
\r\nauthor = {Dorte Hammersh\u00f8i and Anne Wolff and Lykke Junker Andersen and Rikke Louise Mortensen and Mads Dalsgaard Nielsen and Stefanie Aagard Skov Larsen},
\r\neditor = {Abigail Anne Kressner and Jonathan Regev and Jakob Christensen-Dalsgaard and Lisbeth Tranebj\u00e6rg and S\u00e9bastien Santurette and Torsten Dau },
\r\nurl = {https:\/\/proceedings.isaar.eu\/index.php\/isaarproc\/article\/view\/2019-34},
\r\nyear = {2020},
\r\ndate = {2020-04-22},
\r\nbooktitle = {Proceedings of the International Symposium on Audiogory and Audiological Research},
\r\nvolume = {7},
\r\npages = {297-304},
\r\nabstract = {The purpose of the present study was to identify the terms hearing aid professionals and their patients use in the communication about the aided listening experience and develop scales that would help characterize this experience in the domain of corrective actions that a hearing care professional may apply. The study comprised a word elicitation task based on observations and interviews from consultations at the Aalborg University Hospital. The results were analyzed by developing an affinity diagram. The resulting 80 words were then sorted by three hearing professionals in a supervised card sorting session. The resulting attributes were included in a 63-point scale design, which (in a usability test including eight hearing-aid users) were considered easy to survey and use, but also including some redundancy and ambiguities. The results suggest that it is possible to develop scales based on the voluntary statements expressed during actual consultations, but it remains uncertain whether the expressions will be interpreted the same way by other patients and professionals.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

Narayanan, Sreeram Kaithali; Piechowiak, Tobias; Wolff, Anne; Houm\u00f8ller, Sabina Storbjerg; Narne, Vijaya K; Loquet, G\u00e9rard; Hougaard, Dan Dupont; Gaihede, Michael; Schmidt, Jesper Hvass; Hammersh\u00f8i, Dorte<\/p>

Speech related hearing aid benefit index derived from standardized self-reported questionnaire data<\/a> Inproceedings<\/span> <\/p>

Kressner, Abigail Anne; Regev, Jonathan; Christensen-Dalsgaard, Jakob; Tranebj\u00e6rg, Lisbeth; Santurette, S\u00e9bastien; Dau, Torsten (Ed.): Proceedings of the International Symposium on Auditory and Audiological Research, <\/span>2020<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{ISAAR2019_sreeram_print,
\r\ntitle = {Speech related hearing aid benefit index derived from standardized self-reported questionnaire data},
\r\nauthor = {Sreeram Kaithali Narayanan and Tobias Piechowiak and Anne Wolff and Sabina Storbjerg Houm\u00f8ller and Vijaya K. Narne and G\u00e9rard Loquet and Dan Dupont Hougaard and Michael Gaihede and Jesper Hvass Schmidt and Dorte Hammersh\u00f8i},
\r\neditor = {Abigail Anne Kressner and Jonathan Regev and Jakob Christensen-Dalsgaard and Lisbeth Tranebj\u00e6rg and S\u00e9bastien Santurette and Torsten Dau },
\r\nurl = {https:\/\/proceedings.isaar.eu\/index.php\/isaarproc\/article\/view\/2019-45},
\r\nyear = {2020},
\r\ndate = {2020-04-14},
\r\nbooktitle = {Proceedings of the International Symposium on Auditory and Audiological Research},
\r\nvolume = {7},
\r\nabstract = {Speech understanding in noisy environments has been the most desired hearing-aid (HA) benefit sought by HA users. This paper examines the possibility of developing a speech-related HA benefit index from the speech- related questions in the self-reported questionnaire data. One question from Health-Related Quality of Life (HRQoL) instrument 15D and nine questions from the Speech, Spatial and Qualities of Hearing Scale (SSQ) having a direct implication to speech were selected for the analysis. After applying weights relevant to 15D, a delta of base-line (prior to HA fitting) and follow-up (two months after the initial fitting) responses to the selected questions were determined. A principal component analysis (PCA) was performed on the scaled and centered delta values. The resultant principal component scores were used to derive the composite index indicative of speech-related HA benefit.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

\r\n

2017<\/h3>\r\n <\/td>\r\n <\/tr>

van Hauen, Sigurd M\u00f8ller; Rukj\u00e6r, Andreas Harbo; Ordo\u00f1ez, Rodrigo; Hammersh\u00f8i, Dorte<\/p>

Estimating auditory filter bandwidth using distortion product otoacoustic emissions<\/a> Inproceedings<\/span> <\/p>

Santurette, S\u00e9bastien; Dau, Torsten; Christensen-Dalsgaard, Jakob; Tranebj\u00e6rg, Lisbeth; Poulsen, Torben (Ed.): Proceedings of the International Symposium on Auditory and Audiological Research: Vol. 6: Adaptive Processes in Hearing, <\/span>pp. 263-270, <\/span>The Danavox Jubilee Foundation <\/span>2017<\/span>, ISBN: 978-87-990013-6-1<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{SigurdISAAR2017,
\r\ntitle = {Estimating auditory filter bandwidth using distortion product otoacoustic emissions},
\r\nauthor = {Sigurd M\u00f8ller van Hauen and Andreas Harbo Rukj\u00e6r and Rodrigo Ordo\u00f1ez and Dorte Hammersh\u00f8i},
\r\neditor = {S\u00e9bastien Santurette and Torsten Dau and Jakob Christensen-Dalsgaard and Lisbeth Tranebj\u00e6rg and Torben Poulsen},
\r\nurl = {https:\/\/proceedings.isaar.eu\/index.php\/isaarproc\/article\/view\/2017-32},
\r\nisbn = {978-87-990013-6-1},
\r\nyear = {2017},
\r\ndate = {2017-08-23},
\r\nbooktitle = {Proceedings of the International Symposium on Auditory and Audiological Research: Vol. 6: Adaptive Processes in Hearing},
\r\npages = {263-270},
\r\norganization = {The Danavox Jubilee Foundation},
\r\nabstract = {The basic frequency selectivity in the listener\u2019s hearing is often characterized by auditory filters. These filters are determined through listening tests, which estimate the masking threshold as a function of frequency of the tone and the bandwidth of the masking sound. The auditory filters have been shown to be wider for listeners with sensorineural impairment. In a recent study (Christensen et al., 2017) it was demonstrated on group basis that the distortion product stimulus ratio that provided the strongest 2 f1\u2212 f2 component at low frequencies had a strong correlation to the theoretical relation between frequency and auditory filter bandwidth, described by the equivalent rectangular bandwidth (ERB, Glasberg and Moore, 1990). The purpose of the present study is to test whether a similar correlation exists on an individual basis at normal audiometric frequencies. The optimal 2 f1 \u2212 f2 DPOAE ratio is determined for stimulus ratios between 1.1 and 1.6, at fixed primary levels (L1\/L2 = 65\/45 dB SPL). The auditory filters are determined using notched-noise method in a two alternative forced choice experiment with noise levels at 40 dB SPL\/Hz. Optimal ratios and auditory filters are determined at 1, 2, and 4 kHz for 10 young normal-hearing subjects.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

Close<\/a><\/p><\/div>

\r\n

2016<\/h3>\r\n <\/td>\r\n <\/tr>

Hammersh\u00f8i, Dorte; Ordo\u00f1ez, Rodrigo; Christensen, Anders Tornvig<\/p>

More robust estimates for DPOAE level at audiometric frequencies<\/a> Inproceedings<\/span> <\/p>

Proceedings of the 22nd International Congress on Acoustics, Buenos Aires, Argentina, September 5-9 2016, <\/span>pp. 1-9, <\/span>ICA, <\/span>2016<\/span>.<\/p>

Abstract<\/a><\/span> | Links<\/a><\/span> | BibTeX<\/a><\/span><\/p>

@inproceedings{Hammersh\u00f8i2016,
\r\ntitle = {More robust estimates for DPOAE level at audiometric frequencies},
\r\nauthor = {Dorte Hammersh\u00f8i and Rodrigo Ordo\u00f1ez and Anders Tornvig Christensen},
\r\nurl = {http:\/\/www.ica2016.org.ar\/ica2016proceedings\/ica2016\/ICA2016-0885.pdf},
\r\nyear = {2016},
\r\ndate = {2016-09-05},
\r\nbooktitle = {Proceedings of the 22nd International Congress on Acoustics, Buenos Aires, Argentina, September 5-9 2016},
\r\nnumber = {885},
\r\npages = {1-9},
\r\npublisher = {ICA},
\r\nabstract = {Current clinical methods determine 2 f1 \u2212 f2 distortion product oto-acoustic emission (DPAOE)
\r\nlevels at discrete frequencies, and often only at the audiometric standard frequencies in order
\r\nto save time. The measured result is known to be a superposition of at least two components,
\r\nthe generator component originating from a region around the primary f2, and the reflection
\r\ncomponent from the 2 f1 \u2212 f2 site. Distinct interference patterns in high resolution DPOAE data
\r\nreveal that these two components can be of similar magnitude, and periodically cancel each
\r\nother entirely. When measurements are made at only few frequencies, there is a risk to find one
\r\nor more low amplitude measurement, even in a healthy ear with otherwise high emissions. In
\r\nthe present study, data from previous studies measured with a high frequency resolution is used
\r\nfor simulating a better use of measurements at and around the audiometric frequency. A \u201dlocal\u201d
\r\nmodel of the two component superposition is applied, and the trade-off between measurement
\r\ntime, and robustness of the measure is discussed.},
\r\nkeywords = {},
\r\npubstate = {published},
\r\ntppubtype = {inproceedings}
\r\n}
\r\n<\/div>

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Current clinical methods determine 2 f1 \u2212 f2 distortion product oto-acoustic emission (DPAOE)
\r\nlevels at discrete frequencies, and often only at the audiometric standard frequencies in order
\r\nto save time. The measured result is known to be a superposition of at least two components,
\r\nthe generator component originating from a region around the primary f2, and the reflection
\r\ncomponent from the 2 f1 \u2212 f2 site. Distinct interference patterns in high resolution DPOAE data
\r\nreveal that these two components can be of similar magnitude, and periodically cancel each
\r\nother entirely. When measurements are made at only few frequencies, there is a risk to find one
\r\nor more low amplitude measurement, even in a healthy ear with otherwise high emissions. In
\r\nthe present study, data from previous studies measured with a high frequency resolution is used
\r\nfor simulating a better use of measurements at and around the audiometric frequency. A \u201dlocal\u201d
\r\nmodel of the two component superposition is applied, and the trade-off between measurement
\r\ntime, and robustness of the measure is discussed.<\/div>

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