Speech masking release in listeners with flat hearing loss: Effects of masker fluctuation rate on identification scores and phonetic feature reception
Speech masking release in listeners with flat hearing loss: Effects of masker fluctuation rate on identification scores and phonetic feature reception
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DOI：
10.1080/14992020600753213
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发表时间：
2006-09-01
影响因子：
2.7
通讯作者：
Debruille, Xavier
中科院分区：
文献类型：
--
作者：
Lorenzi, Christian;Husson, Mathieu;Debruille, Xavier
在四名耳蜗扁平型听力损失的听者和四名年龄匹配的正常听力听者中，测量了静止和调幅噪声掩蔽器的辅音识别。掩模调制速率系统地在2 ~ 128 Hz之间变化。在所有听力正常的听众中，在8-16 Hz波动的掩蔽器中，掩蔽释放（MR）在波动噪声中比在静止噪声中具有更好的识别性能。相比之下，在四名受损听众中，只有两名出现了核磁共振。在这些听众中，MR比正常人差，并且在较低的频率下达到峰值，即2或8赫兹。在所有听力正常的听者中，在2到64赫兹之间，MR对应于声音、位置和方式信息的接收增加。在受损的听者中，主要观察到对方式的信息接收增加，而主要是对位置的信息接收减少，但这些差异并不显著。对于所有的语音特征，MR在较低的掩模波动率（32 Hz）下被观察到。因此，本研究表明，耳蜗损伤在定量和定性上都影响MR。
Consonant identification was measured for a stationary and amplitude-modulated noise masker in four listeners with flat Cochlear hearing loss, and four age-matched normal-hearing listeners. The masker modulation rate was systematically varied between 2 and 128 Hz. Masking release (MR), that is better identification performance in fluctuating, than in stationary noise, was highest in a masker fluctuating at 8-16 Hz in all normal-hearing listeners. In comparison, MR was only observed in two out of the four impaired listeners. In these listeners, MR was poorer than normal, and peaked at lower rates, that is 2 or 8 Hz. MR corresponded to increased reception of information for voicing, place, and manner between 2 and 64 Hz in all normal-hearing listeners. In impaired listeners, increased reception of information was mainly observed for manner, and mainly reduced for place, but these differences were not significant. For all phonetic features, MR was observed at lower masker fluctuation rates ( : 32 Hz) than in normal-hearing listeners. This study therefore shows that cochlear damage affects MR, both quantitatively and qualitatively.