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Using binaural beat sensitivity to explore mechanisms of bimodal temporal envelope beat sensitivity
- Source :
- The Journal of the Acoustical Society of America. 143:1939-1939
- Publication Year :
- 2018
- Publisher :
- Acoustical Society of America (ASA), 2018.
-
Abstract
- Current cochlear implant (CI) fitting strategies aim to maximize speech perception through the CI by allocating all spectral information across the electrode array without regard to tonotopic placement of each electrode along the basilar membrane. For patients with considerable residual hearing in the non-implanted ear, this approach may not be optimal for binaural hearing. This study aims to explore fitting procedures in which CI maps better complement information from the acoustic ear by reducing the frequency mismatch between them. We investigate the mechanisms of binaural temporal-envelope beat sensitivity in normal-hearing listeners using bandpass filtered pulse trains with parameters including stimulus level, filter bandwidth, filter slope, and spectral overlap using bandpass filtered pulse trains. We find the minimum baseline interaural timing difference and spectral mismatch that normal-hearing listeners can tolerate while maintaining their ability to detect interaural timing differences. Initial results consistently demonstrate maximum sensitivity to binaural beats when place of stimulation is matched across ears. The outcomes of this study will provide new information on binaural interactions in normal-hearing listeners and guide methodology for incoming single-sided-deafness patients as we adjust their CI maps in an effort to reduce the frequency-mismatch. [Work supported by NIH grant F32DC016815-01.]Current cochlear implant (CI) fitting strategies aim to maximize speech perception through the CI by allocating all spectral information across the electrode array without regard to tonotopic placement of each electrode along the basilar membrane. For patients with considerable residual hearing in the non-implanted ear, this approach may not be optimal for binaural hearing. This study aims to explore fitting procedures in which CI maps better complement information from the acoustic ear by reducing the frequency mismatch between them. We investigate the mechanisms of binaural temporal-envelope beat sensitivity in normal-hearing listeners using bandpass filtered pulse trains with parameters including stimulus level, filter bandwidth, filter slope, and spectral overlap using bandpass filtered pulse trains. We find the minimum baseline interaural timing difference and spectral mismatch that normal-hearing listeners can tolerate while maintaining their ability to detect interaural timing differences. Initial ...
- Subjects :
- Sound localization
Speech perception
Binaural beats
Acoustics and Ultrasonics
Computer science
Speech recognition
medicine.medical_treatment
Stimulus (physiology)
law.invention
Basilar membrane
Arts and Humanities (miscellaneous)
law
Cochlear implant
otorhinolaryngologic diseases
medicine
Electrode array
Tonotopy
Binaural recording
Subjects
Details
- ISSN :
- 00014966
- Volume :
- 143
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi...........4209db54edd6428cc7dcc6e998ac35be
- Full Text :
- https://doi.org/10.1121/1.5036342