Cochlear Implant Microphone Location Affects Speech Recognition in Diffuse Noise (Record no. 2495)
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| 000 -LEADER | |
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| fixed length control field | 03373nam a22001697a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20151014162409.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 151014b xxu||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | National Acoustic Laboratories |
| 245 ## - TITLE STATEMENT | |
| Title | Cochlear Implant Microphone Location Affects Speech Recognition in Diffuse Noise |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc | Background: Despite improvements in cochlear implants (CIs), CI recipients continue to experience<br/>significant communicative difficulty in background noise. Many potential solutions have been proposed<br/>to help increase signal-to-noise ratio in noisy environments, including signal processing and external<br/>accessories. To date, however, the effect of microphone location on speech recognition in noise has<br/>focused primarily on hearing aid users.<br/>Purpose: The purpose of this study was to (1) measure physical output for the T-Mic as compared with<br/>the integrated behind-the-ear (BTE) processor mic for various source azimuths, and (2) to investigate the<br/>effect of CI processor mic location for speech recognition in semi-diffuse noise with speech originating<br/>from various source azimuths as encountered in everyday communicative environments.<br/>Research Design: A repeated-measures, within-participant design was used to compare performance<br/>across listening conditions.<br/>Study Sample: A total of 11 adults with Advanced Bionics CIs were recruited for this study.<br/>Data Collection and Analysis: Physical acoustic output was measured on a Knowles Experimental<br/>Mannequin for Acoustic Research (KEMAR) for the T-Mic and BTE mic, with broadband noise presented<br/>at 0 and 90 (directed toward the implant processor). In addition to physical acousticmeasurements, we also<br/>assessed recognition of sentences constructed by researchers at Texas Instruments, the Massachusetts<br/>Institute of Technology, and the Stanford Research Institute (TIMIT sentences) at 60 dBA for speech source<br/>azimuths of 0, 90, and 270. Sentences were presented in a semi-diffuse restaurant noise originating from<br/>the R-SPACE 8-loudspeaker array. Signal-to-noise ratio was determined individually to achieve approximately<br/>50%correct in the unilateral implanted listening condition with speech at 0. Performance was compared<br/>across the T-Mic, 50/50, and the integrated BTE processor mic.<br/>Results: The integrated BTE mic provided approximately 5 dB attenuation from 1500–4500 Hz for signals<br/>presented at 0 as compared with 90 (directed toward the processor). The T-Mic output was essentially<br/>equivalent for sources originating from 0 and 90. Mic location also significantly affected sentence recognition<br/>as a function of source azimuth,with the T-Mic yielding the highest performance for speech originating<br/>from 0.<br/>Conclusions: These results have clinical implications for (1) future implant processor design with<br/>respect to mic location, (2) mic settings for implant recipients, and (3) execution of advanced speech<br/>testing in the clinic. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Cochlear implants, microphone location, R-SPACE, restaurant noise, T-Mic, SNR, speech recognition |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Elizabeth R. Kolberg* |
| 773 0# - HOST ITEM ENTRY | |
| Relationship information | 26:51–58 (2015) |
| Title | J Am Acad Audiol |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/252/Cochlear%20implant%20microphone%20location%20affects%20speech%20recognition%20in%20diffuse%20noise.pdf?sequence=1&isAllowed=y">http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/252/Cochlear%20implant%20microphone%20location%20affects%20speech%20recognition%20in%20diffuse%20noise.pdf?sequence=1&isAllowed=y</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Universal Decimal Classification |
| Koha item type | Periodical publication |
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