Preminger Jill E, Carpenter Ryan, Ziegler Craig H
University of Louisville School of Medicine, Program in Audiology, KY 40292, USA.
J Am Acad Audiol. 2005 Sep;16(8):600-13; quiz 631-2. doi: 10.3766/jaaa.16.8.9.
Using the threshold equalizing noise (TEN) test, 49 subjects with at least two pure-tone thresholds per ear greater than 50 dB HL and none greater than 80 dB HL were evaluated for the presence or absence of dead regions. The purpose of this study was to (1) assess the prevalence of cochlear dead regions in this clinical population, (2) measure whether listeners with dead regions performed differently than listeners without dead regions on a speech intelligibility in noise test, and (3) determine whether cochlear dead regions are associated with reduced subjective hearing aid performance. The results showed that (1) twenty-nine percent of the subjects tested positive for dead regions, (2) listeners with dead regions had poorer sentence understanding in noise than listeners without dead regions and (3) listeners with dead regions perceived poorer subjective hearing aid performance in listening environments with reverberation or background noise as compared to those without dead regions.
使用阈值均衡噪声（TEN）测试，对49名受试者进行了评估，这些受试者每只耳朵至少有两个纯音阈值大于50 dB HL且无大于80 dB HL的阈值，以确定是否存在死区。本研究的目的是：（1）评估该临床人群中耳蜗死区的患病率；（2）测量在噪声中的言语可懂度测试中，有死区的听者与无死区的听者表现是否不同；（3）确定耳蜗死区是否与主观助听器性能下降有关。结果显示：（1）29%的受试者死区测试呈阳性；（2）有死区的听者在噪声中的句子理解能力比无死区的听者差；（3）与无死区的听者相比，有死区的听者在有混响或背景噪声的聆听环境中主观感受到的助听器性能较差。
