Turner C W, Brus S L
Department of Speech Pathology and Audiology, University of Iowa, Iowa City 52242, USA.
J Acoust Soc Am. 2001 Jun;109(6):2999-3006. doi: 10.1121/1.1371757.
The present study examined the benefits of providing amplified speech to the low- and mid-frequency regions of listeners with various degrees of sensorineural hearing loss. Nonsense syllables were low-pass filtered at various cutoff frequencies and consonant recognition was measured as the bandwidth of the signal was increased. In addition, error patterns were analyzed to determine the types of speech cues that were, or were not, transmitted to the listeners. For speech frequencies of 2800 Hz and below, a positive benefit of amplified speech was observed in every case, although the benefit provided was very often less than that observed in normal-hearing listeners who received the same increase in speech audibility. There was no dependence of this benefit upon the degree of hearing loss. Error patterns suggested that the primary difficulty that hearing-impaired individuals have in using amplified speech is due to their poor ability to perceive the place of articulation of consonants, followed by a reduced ability to perceive manner information.
本研究探讨了为不同程度感音神经性听力损失的听众的低频和中频区域提供放大语音的益处。无意义音节在不同截止频率下进行低通滤波，并在信号带宽增加时测量辅音识别率。此外，分析错误模式以确定传递给听众或未传递给听众的语音线索类型。对于2800Hz及以下的语音频率，在每种情况下都观察到放大语音的积极益处，尽管所提供的益处通常小于听力正常的听众在语音可听度得到相同提高时所观察到的益处。这种益处与听力损失程度无关。错误模式表明，听力受损个体在使用放大语音时的主要困难在于他们感知辅音发音部位的能力较差，其次是感知发音方式信息的能力下降。
