The effects of hearing loss and noise masking on the masking release for speech in temporally complex backgrounds
The effects of hearing loss and noise masking on the masking release for speech in temporally complex backgrounds
复制标题
DOI：
10.1044/jslhr.4103.549
复制
发表时间：
1998-06-01
影响因子：
2.6
通讯作者：
Montoya, DY
中科院分区：
文献类型：
--
作者：
Bacon, SP;Opie, JM;Montoya, DY
语音识别在三组听众中进行了测量：（可能）耳蜗源性感音神经性听力损失（HL），听力正常（NH）和听力正常的人在频谱形状噪声的存在下听，提高了他们的纯音阈值，以匹配HL组（NM）中的个体听众。性能进行了测量，在四个不同的背景下，只有在他们的时间包络：稳态（SS）的语音形状的噪声，语音形状的噪声调制的包络多说话者的胡言乱语（MT），语音形状的噪声调制的包络单说话者的语音（ST），和语音形状的噪声调制的10 Hz的方波（SQ）。阈值信噪比（SNR）通常是最好的ST，特别是SQ条件下，表明在这些调制背景的掩蔽释放。SS和MT条件下的SNR基本上彼此相同。掩蔽释放是最大的听众在NH组，它往往会减少听力损失的增加。在HL组的11名听众中，有5名的掩蔽释放与NM组的掩蔽释放几乎相同;在其他6名听众中，掩蔽释放小于NM组。减少掩蔽释放模拟最好的那些HL听众的掩蔽释放相对较大。这些结果表明，在感音神经性听力损失的听众中，掩蔽释放减少有时只能完全由可听度降低来解释。
Speech recognition was measured in three groups of listeners: those with sensorineural hearing loss of (presumably) cochlear origin (HL), those with normal hearing (NH), and those with normal hearing who listened in the presence of a spectrally shaped noise that elevated their pure-tone thresholds to match those of individual listeners in the HL group (NM). Performance was measured in four backgrounds that differed only in their temporal envelope: steady-state (SS) speech-shaped noise, speech-shaped noise modulated by the envelope of multi-talker babble (MT), speech-shaped noise modulated by the envelope of single-talker speech (ST), and speech-shaped noise modulated by a 10-Hz square wave (SQ). Threshold signal-to-noise ratios (SNRs) were typically best in the ST and especially the SQ conditions, indicating a masking release in those modulated backgrounds. SNRs in the SS and MT conditions were essentially identical to one another. The masking release was largest in the listeners in the NH group, and it tended to decrease as hearing loss increased. In 5 of the 11 listeners in the HL group, the masking release was nearly identical to that obtained in the NM group matched to those listeners; in the other 6 listeners, the release was smaller than that in the NM group. The reduced masking release was simulated best in those HL listeners for whom the masking release was relatively large. These results suggest that reduced masking release for speech in listeners with sensorineural hearing loss can only sometimes be accounted for entirely by reduced audibility.