Spectrotemporal Modulation Detection and Speech Perception by Cochlear Implant Users
Spectrotemporal Modulation Detection and Speech Perception by Cochlear Implant Users
复制标题
人工耳蜗用户的时谱调制检测和语音感知
作者：
J. Won;I. Moon;S. Jin;Heesung Park;Jihwan Woo;Yang;W. Chung;S. Hong
研究了人工耳蜗（CI）使用者的频谱时间调制（STM）检测性能。该测试涉及区分未调制的稳定噪声和调制的刺激。调制的刺激呈现频率随时间变化的频率调制模式。为了研究不同调制条件下的STM检测性能，采用了两种不同的时间调制速率（5和10 Hz）和三种不同的频谱调制密度（0.5、1.0和2.0周期/倍频程），产生总共6种不同的STM刺激条件。为了探索电听觉如何限制CI用户的STM敏感性不同于声学听觉，正常听力（NH）和听力受损（HI）的听众也被测试在相同的任务。STM检测性能最好的NH科目，其次是HI科目。平均而言，CI受试者表现出最差的性能，但一些CI受试者表现出高水平的STM检测性能，可与声学听力相媲美。在安静和噪声环境下，STM检测性能和语音识别性能之间存在显著相关性。为了了解频谱和时间调制线索对CI用户语音感知能力的相对贡献，频谱和时间调制检测分别进行，并与STM检测和语音感知性能。结果表明，慢的频谱调制，而不是慢的时间调制可能是重要的，以确定语音感知能力CI用户。最后，在无学习的情况下，STM检测的重测信度良好。本研究表明，STM检测可能是一个有用的工具，以评估CI声音处理策略的能力，提供临床相关的声学调制信息。
Spectrotemporal modulation (STM) detection performance was examined for cochlear implant (CI) users. The test involved discriminating between an unmodulated steady noise and a modulated stimulus. The modulated stimulus presents frequency modulation patterns that change in frequency over time. In order to examine STM detection performance for different modulation conditions, two different temporal modulation rates (5 and 10 Hz) and three different spectral modulation densities (0.5, 1.0, and 2.0 cycles/octave) were employed, producing a total 6 different STM stimulus conditions. In order to explore how electric hearing constrains STM sensitivity for CI users differently from acoustic hearing, normal-hearing (NH) and hearing-impaired (HI) listeners were also tested on the same tasks. STM detection performance was best in NH subjects, followed by HI subjects. On average, CI subjects showed poorest performance, but some CI subjects showed high levels of STM detection performance that was comparable to acoustic hearing. Significant correlations were found between STM detection performance and speech identification performance in quiet and in noise. In order to understand the relative contribution of spectral and temporal modulation cues to speech perception abilities for CI users, spectral and temporal modulation detection was performed separately and related to STM detection and speech perception performance. The results suggest that that slow spectral modulation rather than slow temporal modulation may be important for determining speech perception capabilities for CI users. Lastly, test–retest reliability for STM detection was good with no learning. The present study demonstrates that STM detection may be a useful tool to evaluate the ability of CI sound processing strategies to deliver clinically pertinent acoustic modulation information.
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影响因子：
2.4
作者：
Henry, BA;Turner, CW
通讯作者：
Turner, CW
人工耳蜗收听者频谱纹波辨别的跨通道处理证据。
DOI：
10.1121/1.3624820
发表时间：
2011
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Won,JongHo;Jones,GaryL;Drennan,WardR;Jameyson,ElyseM;Rubinstein,JayT
通讯作者：
Rubinstein,JayT
影响因子：
2.4
作者：
Henry, BA;Turner, CW;Behrens, A
通讯作者：
Behrens, A
影响因子：
2.4
作者：
Friesen, LM;Shannon, RV;Wang, X
通讯作者：
Wang, X