Horizontal sound localization in cochlear implant users with a contralateral hearing aid (Record no. 2868)
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| 000 -LEADER | |
|---|---|
| fixed length control field | nam a22 7a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20180321154026.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 180321b ||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | National Acoustics Laboratories |
| 245 ## - TITLE STATEMENT | |
| Title | Horizontal sound localization in cochlear implant users with a contralateral hearing aid |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc | Interaural differences in sound arrival time (ITD) and in level (ILD) enable us to localize sounds in the<br/>horizontal plane, and can support source segregation and speech understanding in noisy environments.<br/>It is uncertain whether these cues are also available to hearing-impaired listeners who are bimodally<br/>fitted, i.e. with a cochlear implant (CI) and a contralateral hearing aid (HA).<br/>Here, we assessed sound localization behavior of fourteen bimodal listeners, all using the same Phonak<br/>HA and an Advanced Bionics CI processor, matched with respect to loudness growth. We aimed to<br/>determine the availability and contribution of binaural (ILDs, temporal fine structure and envelope ITDs)<br/>and monaural (loudness, spectral) cues to horizontal sound localization in bimodal listeners, by systematically<br/>varying the frequency band, level and envelope of the stimuli.<br/>The sound bandwidth had a strong effect on the localization bias of bimodal listeners, although<br/>localization performance was typically poor for all conditions. Responses could be systematically<br/>changed by adjusting the frequency range of the stimulus, or by simply switching the HA and CI on and<br/>off. Localization responses were largely biased to one side, typically the CI side for broadband and highpass<br/>filtered sounds, and occasionally to the HA side for low-pass filtered sounds. HA-aided thresholds<br/>better than 45 dB HL in the frequency range of the stimulus appeared to be a prerequisite, but not a<br/>guarantee, for the ability to indicate sound source direction.<br/>We argue that bimodal sound localization is likely based on ILD cues, even at frequencies below<br/>1500 Hz for which the natural ILDs are small. These cues are typically perturbed in bimodal listeners,<br/>leading to a biased localization percept of sounds. The high accuracy of some listeners could result from a<br/>combination of sufficient spectral overlap and loudness balance in bimodal hearing.<br/>© 2016 Elsevier B.V. All |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Sound localization Cochlear implants; Bimodal stimulation; Binaural cues; Directional hearing |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lidwien C.E. Veugen |
| 773 0# - HOST ITEM ENTRY | |
| Relationship information | 336 (2016) 72e82 |
| Title | Hearing Research |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/843/Horizontal%20sound%20localizatin%20in%20cochlear%20implant%20users.pdf?sequence=1&isAllowed=y">https://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/843/Horizontal%20sound%20localizatin%20in%20cochlear%20implant%20users.pdf?sequence=1&isAllowed=y</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Universal Decimal Classification |
| Koha item type | Journal article |
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