ISAAR 2015 'Individual hearing loss'

Wednesday 09 Sep 15

Contact

Sébastien Santurette
Assistant Professor
DTU Electrical Engineering
+45 45 25 39 52

Contact

Torsten Dau
Professor
DTU Electrical Engineering
+45 45 25 39 77

Two hundred professional researchers, scientists, and PhD students from all over the world travelled to Nyborg, Denmark in order to participate in the fifth International Symposium on Auditory and Audiological Research. This year’s theme was ‘Individual hearing loss - Characterization, modelling, compensation strategies'.

On August 26-28 scientists from seventeen different counties met to give lectures, discuss posters and talk about the topic of this year which the organizers from Hearing Systems and the board members had prepared. There were many different test methods and conclusions circulating which both impressed and inspired the other participants. Agnes Leger illustrated with her presentation that hearing impaired individuals with normal hearing at low frequencies may have major problems in other contexts. She also explained that there may also be very significant differences in hearing abilities among people with normal hearing. Many of the scientists had material on a large scale, involving a number of test subjects and many interesting conclusions and ideas for how to conduct scientific test experiments in the future.

The best thing about this conference is that we have got Liberman’s work 'on board',” Jacob Christensen-Dalsgaard and Ture Andersen, both ISAAR board members, agreed.
  "It's something that has been up at the symposiums the last five years. But it is totally revolutionary now because in the past we believed that there were only temporary threshold shifts with sound exposure and that the sound levels that provided temporary threshold shift were harmless. Liberman shows that there may be damage to the underlying nerve fibers. This may mean that many of the current standards of how much noise people can tolerate have to be reconsidered," Jacob Christensen-Dalsgaard said.
"There are extremely large individual differences, at this stage from the classical observations. But this aspect opens up an even greater variability," Ture Andersen supplemented.

Another problem several of the presenters focused on was that people’s sensitivity to noise exposure could vary significantly and that some people may be more genetically predisposed to be sensitive to noise.


  

After each presentation there was the opportunity to put questions to the scientists and to discuss test methods for individual differences

 

Both Lars Bramsløw, Erikshom Research Center, DK, and Karolina Smeds from Widex’ research department in Stockholm were fascinated by a presentation by Larry Humes, Indiana University, US [Individual differences in auditory perception among older adults with impaired hearing]
"He really knows about how to make individual analysis instead of group analysis," Lars Bramsløw, said.
"Yes, and he had used a gigantic test battery and tried to highlight the type of test that could truly predict something. Very impressive. Both the individual approach he had for the analysis was interesting, and then there was the gauge of the study with facts and suggestions about how the predictive methods could be applied in the future," Karolina Smeds added.
Lars Bramsløw was also impressed by Andrew Oxenham, University of Minnesota, proving his own hypothesis [Characterizing individual differences in frequency coding: Inplications for hearing loss] but then also testing the alternative hypothesis, which turned out to be true as well.
"A good example of critical research," Lars Bramsløw remarked.

Between the many interesting lectures and talks there were opportunities to discuss the topics and network in the break in the nice surroundings at Nyborg Strand. Here Axel Ahrens from the Hearing Systems group has a chance to talk to Robert Baumgartner from the Austrian Academy of Sciences (in the middle) who has also been visiting the research group several times in the INSPIRE network.

“The program has been organized in such a way that there is a good storyline in the talks,” Robert Baumgartner said.

  

In the afternoon there was a chance to study each other's research during the poster sessions

"It is good to meet at lot of people from this area. Previously I have only seen their names on paper. Now I have a chance to talk with them about my project. "
Mahdie Karbasi

Arturo Moncada Torres,KU Leuven, BE, and Mahdie Karbasi from Ruhr University Bochum GE, both found  the content and the conference interesting and also like Denmark and the Hearing System group.
“It is good to meet at lot of people from this area. Previously I have only seen their names on paper. Now I have a chance to talk with them about my project. It is also good talking to people, even when it is not exactly in my field,” Mahdie Karbasi said.

 

Last part of the symposium was about individual diagnostics and compensations strategies. Brent Edwards, EarLens Corp, US, gave an interesting aspect about hearing aid fitting through novel diagnostics and self-fitting tools: “We should find out what the meaningful improvements in treatment for the patient and clinician are so that we can implement research results concretely in clinical practice,“ Brent Edwards said and stressed that patient control will play a larger and larger role in the future for hearing care.

Joel Beilin, employee at Sivantos Pte Ltd,  travelled all the way from Singapore to be present at the Symposium.
"It has been a very exciting and interesting program, and some brilliant speakers and posts. First of all, it is a very relevant theme which is very central to what we are dealing with and which points in the direction of what I think we're going to see in the future. The organizers have also managed to establish a program of very professional people who not only know what they are talking about, but are also able to explain it in an interesting and exciting way, and it is a pleasure to listen to them all the way through. So it has been worth the trip from Singapore, Joel Beilin concluded. (Here in a conversation with Ture Andersen)

Graphic design: Helene Ingerslev

 


30 lectures were given in the auditorium, 53 posters were presented, and 200 professionals from the hearing aid industry, clinics, university research departments and students participated in the symposium. 17 countries were represented at ISAAR 2015.

ISAAR International Symposium on Auditory and Audiological Research, formerly known as Danavox Symposium was founded in 1968. It takes place every second year. The symposium is organized by the Danavox Jubilee Foundation in collaboration with Hearing Systems, DTU, and supported by GN Resound. The foundation is managed by a board of scientific specialists within hearing research, independent of GN ReSound.
Read more and see all abstracts on
www.isaar.eu
The next ISAAR Symposium will be held in 2017 in at Hotel Nyborg Strand, Denmark; present working title ‘ Adaptive processes in hearing’

Presenters from CAHR research group and affiliates:
Talks:
Federica Bianchi: Effects of cochlear compression and frequency selectivity on  pitch discrimination of

unresolved complex tones

Gerard Encina Llamas: Evaluation of cochlear processing and auditory nerve fiber intensity coding using auditory steady-state responses

Posters:
Predicting masking release of lateralized speech
Alexandre Chabot-Leclerc*, Ewen N. MacDonald, Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Investigating low-frequency compression using the Grid method

Michal Fereczkowski*, Ewen N. MacDonald, Torsten Dau - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Can place-specific cochlear dispersion be represented by auditory steady-state responses?

Andreu Paredes Gallardo*, Bastian Epp, Torsten Dau - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Modeling the role of spectral details in the binaural room impulse response for sound externalization

Henrik Gert Hassager* - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark Fredrik Gran - Research Group, GN ReSound A/S, Ballerup, Denmark
Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark 

Signs of noise-induced neural degeneration in humans

Pernille Holtegaard*,S - Copenhagen University Hospital/Rigshospitalet, Copenhagen, Denmark; Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Steen Østergaard Olsen
- Copenhagen University Hospital/Rigshospitalet, Copenhagen, Denmark

Model of auditory nerve responses to electrical stimulation

Suyash N. Joshi*, Torsten Dau, Bastian Epp - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Auditory-model based assessment of the effects of hearing loss and hearing-aid compression on spectral and temporal resolution

Borys Kowalewski*,S, Ewen N. MacDonald - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark Olaf Strelcyk - Sonova U.S. Corporate Services, Warrenville, IL, USA
Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark 

Lateralized speech perception in normal-hearing and hearing-impaired listeners and its relationship to temporal processing

Gusztáv Lőcsei* - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark Julie Hefting Pedersen, Søren Laugesen - Eriksholm Research Centre, Snekkersten, Denmark
Sébastien Santurette, Torsten Dau, Ewen N. MacDonald
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark 

Effect of harmonic rank on streaming of complex tones

Sara M. K. Madsen* - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark Brian C. J. Moore - Department of Psychology, University of Cambridge, Cambridge, England
Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark 

Perceptual space induced by cochlear implant all-polar stimulation mode
Jeremy Marozeau* - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Colette M. McKay - Bionics Institute, Melbourne, Australia

Statistical representation of sound textures in the impaired auditory system

Richard McWalter*, Torsten Dau - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Revealing auditory nerve fiber loss in humans using auditory brainstem response wave-V latency

Golbarg Mehraei*,S - Massachusetts Institute of Technology, Cambridge, MA; Harvard University, Cambridge, MA, USA
Ann Hickox
- Purdue University, West Lafayette, IN, USA
Andreu Paredes Gallardo
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Hari M. Bharadwaj
- Athinoula A. Martinos Center for Biomedical Imaging, Charlestown MA, USA
Hannah Goldberg
- Boston University, Boston, MA, USA
Sarah Verhulst
- Department of Medical Physics, Oldenburg University, Oldenburg, Germany
Bastian Epp
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
M. Charles Liberman
- Eaton Peabody Laboratory, Boston, MA, USA
Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Barbara G. Shinn-Cunningham
- Boston University, Boston, MA, USA

Model-based analysis of interaural time differences in auditory nerve responses

Arturo Moncada-Torres* - ExpORL, Dept. of Neurosciences, KU Leuven, Leuven, Belgium
Bastian Epp
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Tom Francart
- ExpORL, Dept. of Neurosciences, KU Leuven, Leuven, Belgium
Suyash N. Joshi
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Simultaneous measurement of auditory-steady-state responses and otoacoustic emissions to estimate peripheral compression

Raul Sanchez*,S, Bastian Epp - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

Towards modelling hearing-impaired speech intelligibility

Christoph Scheidiger*, Torsten Dau - Hearing Systems, Department of Electrical Engineering, Technical Univeristy of Denmark, Kgs. Lyngby, Denmark

Evaluation of a clinical auditory profile in hearing-aid candidates

Nicoline Thorup*,S - Department of Otorhinolaryngology and Audiology, Rigshospitalet, Copenhagen, Denmark
Sébastien Santurette, Søren Jørgensen
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Erik Kjærbøl
- Department of Otorhinolaryngology and Audiology, Rigshospitalet, Copenhagen, Denmark
Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Morten Friis
- Department of Otorhinolaryngology and Audiology, Rigshospitalet, Copenhagen, Denmark; University of Copenhagen, Copenhagen, Denmark

Impact of background noise and sentence complexity on cognitive processing effort

Dorothea Wendt*, Torsten Dau, Jens Hjortkjær - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark 

Effects of dynamic-range compression on temporal modulation transfer functions and modulation depth discrimination

Alan Wiinberg* - Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
Morten Løve Jepsen
- Department of Electronics and Audiology, Widex A/S, Lynge, Denmark
Bastian Epp, Torsten Dau
- Hearing Systems, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark

* Denotes a presenting author and S a scholarship recipient

 

http://www.hea.elektro.dtu.dk/News/Nyhed?id=BA270E7A-6B01-4D1C-9E0D-A781A0D10CC4
20 AUGUST 2017