In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 116, No. 4_Supplement ( 2004-10-01), p. 2600-2600
Abstract:
Different talker characteristics can significantly affect speech recognition, especially under conditions of reduced spectral resolution. In the current study, single- and multi-talker vowel recognition was tested with both cochlear implant (CI) patients and normal-hearing (NH) subjects listening to CI simulations. CI users were tested with their everyday processors. NH subjects were tested using four-channel acoustic processors in which the envelope cutoff frequency (20, 160 Hz) and the carrier band (noise-band, sine-wave) conditions were varied. Results showed that CI users’ single-talker vowel recognition was significantly better than multi-talker recognition. Among the simulations, both single- and multi-talker vowel recognition was best with the 160 Hz/sine-wave processor. Also, single-talker performance was significantly better than multi-talker performance only with the 160 Hz/sine-wave processor; there was no difference between single- and multi-talker recognition with the 20 Hz/sine-wave or noise-band processor. While the effects of talker variability were less for the 20 Hz/sine-wave and noise-band processors, overall vowel recognition was also significantly lower. Listeners’ sensitivity to talker variability may indicate their ability to register the relative vowel space for individual talkers. Without sensitivity to talker variability, multi-talker vowel space may collapse, causing cross-talker differences to be confused with phonetic differences. [Research is supported by NIDCD.]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2004
detail.hit.zdb_id:
1461063-2
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