The relationship between ipsilateral cochlear gain reduction and speech-in-noise recognition at positive and negative signal-to-noise ratios
The relationship between ipsilateral cochlear gain reduction and speech-in-noise recognition at positive and negative signal-to-noise ratios
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DOI：
10.1121/10.0003964
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发表时间：
2021-05-01
影响因子：
2.4
通讯作者：
Strickland, Elizabeth A.
中科院分区：
文献类型：
--
作者：
DeRoy Milvae, Kristina;Alexander, Joshua M.;Strickland, Elizabeth A.
调节耳蜗增益的主动机制被假设为影响噪声中的语音感知。然而，耳蜗增益降低量和噪声中语音识别之间关系的证据是混合的。研究结果可能会相互冲突，因为不同的信噪比（SNR）被用来评估噪声中的语音识别。此外，有证据表明，耳蜗增益降低的同侧引出可能比对侧引出更强，然而，大多数研究都调查了对侧下行通路。同侧耳蜗增益降低和噪声中语音识别之间的关系取决于SNR的假设进行了测试。前掩蔽技术被用来量化24名听力正常的年轻成年人的同侧耳蜗增益降低。使用PRESTO-R语句测试测量噪声中的语音识别，该测试使用在-3、0和+3 dB SNR下呈现的语音成形噪声。有趣的是，更大的耳蜗增益降低与噪声中语音识别的降低相关，并且这种相关性的强度随着SNR变得更加不利而增加。这些研究结果支持了这一假设，即SNR影响同侧耳蜗增益降低和噪声中语音识别之间的关系。未来研究耳蜗增益降低和噪声中语音识别之间的关系应考虑SNR和两个下降途径。
Active mechanisms that regulate cochlear gain are hypothesized to influence speech-in-noise perception. However, evidence of a relationship between the amount of cochlear gain reduction and speech-in-noise recognition is mixed. Findings may conflict across studies because different signal-to-noise ratios (SNRs) were used to evaluate speech-in-noise recognition. Also, there is evidence that ipsilateral elicitation of cochlear gain reduction may be stronger than contralateral elicitation, yet, most studies have investigated the contralateral descending pathway. The hypothesis that the relationship between ipsilateral cochlear gain reduction and speech-in-noise recognition depends on the SNR was tested. A forward masking technique was used to quantify the ipsilateral cochlear gain reduction in 24 young adult listeners with normal hearing. Speech-in-noise recognition was measured with the PRESTO-R sentence test using speech-shaped noise presented at -3, 0, and +3 dB SNR. Interestingly, greater cochlear gain reduction was associated with lower speech-in-noise recognition, and the strength of this correlation increased as the SNR became more adverse. These findings support the hypothesis that the SNR influences the relationship between ipsilateral cochlear gain reduction and speech-in-noise recognition. Future studies investigating the relationship between cochlear gain reduction and speech-in-noise recognition should consider the SNR and both descending pathways.