Department of Speech, Language and Hearing Sciences, Purdue University, West Lafayette, Indiana, USA.
Nat Neurosci. 2012 Oct;15(10):1362-4. doi: 10.1038/nn.3216. Epub 2012 Sep 9.
Behavioral studies in humans suggest that sensorineural hearing loss (SNHL) decreases sensitivity to the temporal structure of sound, but neurophysiological studies in mammals provide little evidence for diminished temporal coding. We found that SNHL in chinchillas degraded peripheral temporal coding in background noise substantially more than in quiet. These results resolve discrepancies between previous studies and help to explain why perceptual difficulties in hearing-impaired listeners often emerge in noisy situations.
行为学研究表明,感音神经性听力损失(SNHL)会降低人对声音时间结构的敏感性,但哺乳动物的神经生理学研究几乎没有提供证据表明时间编码能力下降。我们发现,在背景噪声中,SNHL 会大大降低南美栗鼠的外周时间编码,比在安静环境中更为严重。这些结果解决了先前研究之间的差异,并有助于解释为什么听力受损者在嘈杂环境中经常出现感知困难。