Abnormal processing of temporal fine structure in speech for frequencies where absolute thresholds are normal
Abnormal processing of temporal fine structure in speech for frequencies where absolute thresholds are normal
复制标题
DOI：
10.1121/1.2939125
复制
发表时间：
2009-01-01
影响因子：
2.4
通讯作者：
Moore, Brian C. J.
中科院分区：
文献类型：
--
作者：
Lorenzi, Christian;Debruille, Louis;Moore, Brian C. J.
在1.5 kHz下低通滤波的无意义音节的识别对于具有正常听力的受试者和在高频下具有轻度至重度听力损失但在低频下具有正常或接近正常听力的受试者进行比较。对于低于1.5 kHz的频率，两组的绝对阈值大多在正常范围内（< 20 dB听力水平）。性能进行了评估与完整的语音，语音已被处理，以保持只有时间包络线索在几个频带（E语音），和语音已被处理，以消除包络线索尽可能，同时保留时间的精细结构线索，再次在几个频带（TFS语音）。对于完整语音和E语音，听力受损的受试者比听力正常的受试者表现略差，但这种影响只对完整语音有显著性。对于TFS言语，听力受损的受试者表现得比听力正常的受试者差得多，16名听力受损的受试者中有12名表现不佳。结果表明，对于中高频听力损失的人来说，对于绝对阈值在正常范围内的频率，语音的TFS的处理可能会下降。
The identification of nonsense syllables that were lowpass filtered at 1.5 kHz was compared for subjects with normal hearing and subjects with mild-to-severe hearing loss at high frequencies but with normal or near-normal hearing at low frequencies. Absolute thresholds were mostly within the normal range (< 20 dB hearing level) for both groups for frequencies below 1.5 kHz. Performance was assessed with intact speech, speech that had been processed to preserve only temporal envelope cues in a few frequency bands (E speech), and speech that had been processed to remove envelope cues as far as possible while preserving temporal fine structure cues, again in a few frequency bands (TFS speech). For the intact speech and E speech, the hearing-impaired subjects performed slightly more poorly than the normal-hearing subjects, but this effect was significant only for the intact speech. For the TFS speech, the hearing-impaired subjects performed significantly more poorly than the normal-hearing subjects, with 12 out of 16 of the former performing at chance. The results indicate that, for people with hearing loss at medium to high frequencies, the processing of the TFS of speech can be degraded for frequencies where absolute thresholds are within the normal range.