Provoking and minimising potentially destructive binaural stimulation effects in auditory steady-state response (ASSR) measurements

Forfattere

  • Sam David Watson Hearing Systems section, Department of Health Technology, Technical University of Denmark, DK-2800 Lyngby, Denmark
  • Søren Laugesen Interacoustics Research Unit, DK-2800 Lyngby, Denmark
  • Bastian Epp Hearing Systems section, Department of Health Technology, Technical University of Denmark, DK-2800 Lyngby, Denmark

Nøgleord:

ASSR, Binaural Processing, Hearing Aid Fitting, Binaural Interaction, Auditory Steady State Response, EEG Topography, Interference, Clinical Considerations

Resumé

An aided sound-field auditory steady state response (ASSR) has the potential to be used to verify the quality of fit of hearing aids on infants. Each aided ear should ideally be tested independently, but it is suspected that binaural testing may be used by clinics to reduce test time. This study simulates ‘clinically conceivable’ dichotic ASSR sound-field conditions to examine the risk of making false judgements due to unchecked binaural effects. Unaided ASSRs were recorded with a clinical two channel EEG system for 15 normally hearing subjects using a three-band CE-ChirpTM stimulus. It was found that the noise corrected power of a response harmonic can be reduced by up to 10 dB by introducing large ITDs equal to half the time period of the stimulus envelope. This could lead to concluding that a hearing aid fitting is poor, even though the fitting would have passed separate monaural ASSR tests (false referral). No effect was detected for simulated lateralisations of the stimulus, which is beneficial for a proposed aided ASSR approach. Full-scalp ASSR recordings show distinct SNR reductions and topographical changes in response to the large ITDs, and demonstrate the vulnerability of ASSR to montage and inter-subject variation. Findings suggest that multi-harmonic detectors could make binaural measurements robust to artificial reductions of response harmonics cause by large ITDs.

Referencer

Bates, D., Martin, M., Bolker, B., & Walker, S., (2015). “Fitting Linear Mixed-Effects Models Using lme4”, J. Stat. Softw., 67(1), 1-48.
Denk, F., Ernst, S. M. A., Ewert, S. D., and Kollmeier, B., (2018). “Adapting hearing devices to the individual ear acoustics: Database and target response correction functions for various device styles”, Trends Hear., 22, 1-19.
Holube, I., Fredelake, S., Vlaming, M., Kollmeier, B., (2010). “Development and analysis of an International Speech Test Signal (ISTS)”, Int. J. Audiol., 49(12), 891-903.
Kates, J. M., (2008). Digital Hearing Aids, Plural Publishing, Inc., San Diego, California, USA.
Riedel, H., Kollmeier, B., (2002). “Auditory brain stem responses evoked by lateralized clicks: Is lateralization extracted in the human brain stem?”, Hear.s Res., 163, 12-26.
Kuznetsova, A., Brockhoff, P. B., & Christensen, R. H. B., (2017). “lmerTest Package: Tests in Linear Mixed Effects Models”, J. Stat. Softw., 82(13), 1-26.
Laugesen, S., Rieck, J. E., Elberling, C., Dau, T., & Harte, J. M., (2018). “On the Cost of Introducing Speech-Like Properties to a Stimulus for Auditory Steady-State Response Measurements”, Trends Hear., 22, 1-11.
Mehta, K., Mahon, M., Watkin, P., Marriage, J., & Vickers, D., (2019). “A qualitative review of parents’ perspectives on the value of CAEP recording in influencing their acceptance of hearing devices for their child”, Int. J. Audiol., 58(7), 401- 407.
Oostenveld, R., Fries, P., Maris, E., & Schoffelen, J., (2011). “FieldTrip: Open Source Software for Advanced Analysis of MEG, EEG, and Invasive Electrophysiologi- cal Data”, Comput. Intel. Neurosc., 2011, 1-9.
Rance, G. (2008). “Part A - The Role of Auditory Steady-State Responses in Fitting Hearing Aids”, The Auditory Steady-State Response: Generation, Recording, and Clinical Application, Plural Publishing, Inc. San Diego, California, USA, 241-258.
Zhang, F., & Boettcher, F. A., (2008). “Effects of interaural time and level differences on the binaural interaction component of the 80 Hz auditory steady-state response”, J. Am. Acad. Audiol., 19(1), 82-94.

Yderligere filer

Publiceret

2020-04-16

Citation/Eksport

Watson, S. D., Laugesen, S., & Epp, B. (2020). Provoking and minimising potentially destructive binaural stimulation effects in auditory steady-state response (ASSR) measurements. Proceedings of the International Symposium on Auditory and Audiological Research, 7, 469–476. Hentet fra https://proceedings.isaar.eu/index.php/isaarproc/article/view/2019-55

Nummer

Sektion

2019/5. Other topics in auditory and audiological research