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 (< or =32 Hz) than in normal-hearing listeners. This study therefore shows that cochlear damage affects MR, both quantitatively and qualitatively.

译文

在四个患有扁平耳蜗听力损失的听众和四个年龄匹配的正常听力听众中,测量了固定和幅度调制的噪声掩蔽者的辅音识别。掩蔽器调制速率在2和128Hz之间系统地变化。在所有正常听力的听众中,掩蔽释放 (MR) 在波动中比在固定噪声中更好的识别性能,在8-16Hz波动的掩蔽器中最高。相比之下,仅在四个受损听众中的两个中观察到MR。在这些听众中,MR比正常人差,并且以较低的速率 (即2或8Hz) 达到峰值。MR对应于所有正常听力的听众在2到64Hz之间的发声,位置和方式的信息接收增加。在受损的听众中,主要观察到方式的信息接收增加,而地点的信息接收则主要减少,但这些差异并不显着。对于所有语音特征,与正常听力的听众相比,以较低的掩蔽率 (<或 = 32Hz) 观察到MR。因此,这项研究表明,耳蜗损伤在定量和定性上都会影响MR。

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