Populations with low benefit – Work areas

@inproceedings{ISAAR2019_sreeram_print,
title = {Speech related hearing aid benefit index derived from standardized self-reported questionnaire data},
author = {Sreeram Kaithali Narayanan and Tobias Piechowiak and Anne Wolff and Sabina Storbjerg Houmøller and Vijaya K. Narne and Gérard Loquet and Dan Dupont Hougaard and Michael Gaihede and Jesper Hvass Schmidt and Dorte Hammershøi},
editor = {Abigail Anne Kressner and Jonathan Regev and Jakob Christensen-Dalsgaard and Lisbeth Tranebjærg and Sébastien Santurette and Torsten Dau },
url = {https://proceedings.isaar.eu/index.php/isaarproc/article/view/2019-45},
year = {2020},
date = {2020-04-14},
booktitle = {Proceedings of the International Symposium on Auditory and Audiological Research},
volume = {7},
abstract = {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.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}

@inproceedings{SigurdISAAR2017,
title = {Estimating auditory filter bandwidth using distortion product otoacoustic emissions},
author = {Sigurd Møller van Hauen and Andreas Harbo Rukjær and Rodrigo Ordoñez and Dorte Hammershøi},
editor = {Sébastien Santurette and Torsten Dau and Jakob Christensen-Dalsgaard and Lisbeth Tranebjærg and Torben Poulsen},
url = {https://proceedings.isaar.eu/index.php/isaarproc/article/view/2017-32},
isbn = {978-87-990013-6-1},
year = {2017},
date = {2017-08-23},
booktitle = {Proceedings of the International Symposium on Auditory and Audiological Research: Vol. 6: Adaptive Processes in Hearing},
pages = {263-270},
organization = {The Danavox Jubilee Foundation},
abstract = {The basic frequency selectivity in the listener’s 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− 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 − 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.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}

@inproceedings{Hammershøi2016,
title = {More robust estimates for DPOAE level at audiometric frequencies},
author = {Dorte Hammershøi and Rodrigo Ordoñez and Anders Tornvig Christensen},
url = {http://www.ica2016.org.ar/ica2016proceedings/ica2016/ICA2016-0885.pdf},
year = {2016},
date = {2016-09-05},
booktitle = {Proceedings of the 22nd International Congress on Acoustics, Buenos Aires, Argentina, September 5-9 2016},
number = {885},
pages = {1-9},
publisher = {ICA},
abstract = {Current clinical methods determine 2 f1 − f2 distortion product oto-acoustic emission (DPAOE)
levels at discrete frequencies, and often only at the audiometric standard frequencies in order
to save time. The measured result is known to be a superposition of at least two components,
the generator component originating from a region around the primary f2, and the reflection
component from the 2 f1 − f2 site. Distinct interference patterns in high resolution DPOAE data
reveal that these two components can be of similar magnitude, and periodically cancel each
other entirely. When measurements are made at only few frequencies, there is a risk to find one
or more low amplitude measurement, even in a healthy ear with otherwise high emissions. In
the present study, data from previous studies measured with a high frequency resolution is used
for simulating a better use of measurements at and around the audiometric frequency. A ”local”
model of the two component superposition is applied, and the trade-off between measurement
time, and robustness of the measure is discussed.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}