Spectral peak resolution and speech recognition in quiet: Normal hearing, hearing impaired, and cochlear implant listeners
Spectral peak resolution and speech recognition in quiet: Normal hearing, hearing impaired, and cochlear implant listeners
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DOI：
10.1121/1.1944567
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发表时间：
2005-08-01
影响因子：
2.4
通讯作者：
Behrens, A
中科院分区：
文献类型：
--
作者：
Henry, BA;Turner, CW;Behrens, A
研究了正常听力 (NH)、听力受损 (HI) 和人工耳蜗 (CI) 收听者的频谱峰值分辨率。该任务涉及区分两个波纹噪声刺激，其中对数间隔的峰和谷的频率位置互换。波纹间距在 0.13 至 11.31 波纹/倍频程之间自适应变化，并且可以检测到波峰和波谷位置反转的最小波纹间距被确定为每个收听者的频谱峰值分辨率阈值。平均而言，NH 听众的频谱峰值分辨率最好，Cl 听众的频谱峰值分辨率最差，HI 听众的频谱峰值分辨率中等。在三个听众组中，光谱峰值分辨率与安静状态下的元音和辅音识别之间存在显着关系。结果表明，在安静背景下准确识别元音和辅音所需的频谱峰值分辨率约为 4 波纹/倍频程，而低于 1-2 波纹/倍频程的频谱峰值分辨率可能会导致语音识别性能严重下降。这些结果表明，提高 HI 和 Cl 用户的频谱峰值分辨率的努力可能会改善语音识别。 (C) 2005 年美国声学学会。
Spectral peak resolution was investigated in normal hearing (NH), hearings impaired (HI), and cochlear implant (CI) listeners. The task involved discriminating between two rippled noise stimuli in which the frequency positions of the log-spaced peaks and valleys were interchanged. The ripple spacing was varied adaptively from 0.13 to 11.31 ripples/octave, and the minimum ripple spacing at which a reversal in peak and trough positions could be detected was determined as the spectral peak resolution threshold for each listener. Spectral peak resolution was best, on average, in NH listeners, poorest in Cl listeners, and intermediate for HI listeners. There was a significant relationship between spectral peak resolution and both vowel and consonant recognition in quiet across the three listener groups. The results indicate that the degree of spectral peak resolution required for accurate vowel and consonant recognition in quiet backgrounds is around 4 ripples/octave, and that spectral peak resolution poorer than around 1-2 ripples/octave may result in highly degraded speech recognition. These results suggest that efforts to improve spectral peak resolution for HI and Cl users may lead to improved speech recognition. (C) 2005 Acoustical Society of America.