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Spatial Release From Masking in Simulated Cochlear Implant Users With and Without Access to Low-Frequency Acoustic Hearing
| Content Provider | SAGE Publishing |
|---|---|
| Author | Williges, Ben Dietz, Mathias Hohmann, Volker Jürgens, Tim |
| Copyright Year | 2015 |
| Abstract | For normal-hearing listeners, speech intelligibility improves if speech and noise are spatially separated. While this spatial release from masking has already been quantified in normal-hearing listeners in many studies, it is less clear how spatial release from masking changes in cochlear implant listeners with and without access to low-frequency acoustic hearing. Spatial release from masking depends on differences in access to speech cues due to hearing status and hearing device. To investigate the influence of these factors on speech intelligibility, the present study measured speech reception thresholds in spatially separated speech and noise for 10 different listener types. A vocoder was used to simulate cochlear implant processing and low-frequency filtering was used to simulate residual low-frequency hearing. These forms of processing were combined to simulate cochlear implant listening, listening based on low-frequency residual hearing, and combinations thereof. Simulated cochlear implant users with additional low-frequency acoustic hearing showed better speech intelligibility in noise than simulated cochlear implant users without acoustic hearing and had access to more spatial speech cues (e.g., higher binaural squelch). Cochlear implant listener types showed higher spatial release from masking with bilateral access to low-frequency acoustic hearing than without. A binaural speech intelligibility model with normal binaural processing showed overall good agreement with measured speech reception thresholds, spatial release from masking, and spatial speech cues. This indicates that differences in speech cues available to listener types are sufficient to explain the changes of spatial release from masking across these simulated listener types. |
| Related Links | https://journals.sagepub.com/doi/pdf/10.1177/2331216515616940?download=true |
| ISSN | 23312165 |
| Volume Number | 19 |
| Journal | Trends in Hearing (TIA) |
| e-ISSN | 23312165 |
| DOI | 10.1177/2331216515616940 |
| Language | English |
| Publisher | Sage Publications CA |
| Publisher Date | 2015-12-30 |
| Publisher Place | Los Angeles |
| Access Restriction | Open |
| Rights Holder | © The Author(s) 2015 |
| Subject Keyword | electroacoustic stimulation auditory model cochlear implant speech perception bimodal |
| Content Type | Text |
| Resource Type | Article |
| Subject | Otorhinolaryngology Speech and Hearing |
