Sanches Seisse Gabriela Gandolfi, Sanchez Tanit Ganz, Carvallo Renata Mota Mamede
University of São Paulo Medical School - FMUSP, São Paulo, Brazil.
Audiol Neurootol. 2010;15(5):273-81. doi: 10.1159/000272939. Epub 2010 Jan 6.
Our aim was to analyze the influence of subtle cochlear damage on temporal auditory resolution in tinnitus patients. Forty-eight subjects (hearing threshold <or=25 dB HL) were assigned to one of two experimental groups: 28 without auditory complaints (mean age, 28.8 years) and 20 with tinnitus (mean age, 33.5 years). We analyzed distortion product otoacoustic emission growth functions (by threshold, slope, and estimated amplitude), extended high-frequency thresholds, and the Gaps-in-Noise test. There were differences between the groups, principally in the extended high-frequency thresholds and the Gaps-in-Noise test results. Our findings suggest that subtle peripheral hearing impairment affects temporal resolution in tinnitus, even when pure-tone thresholds as conventionally measured appear normal.
我们的目的是分析耳蜗细微损伤对耳鸣患者听觉时间分辨率的影响。48名受试者（听力阈值≤25 dB HL）被分为两个实验组之一：28名无听觉主诉者（平均年龄28.8岁）和20名耳鸣患者（平均年龄33.5岁）。我们分析了畸变产物耳声发射增长函数（通过阈值、斜率和估计幅度）、扩展高频阈值以及噪声间隙测试。两组之间存在差异，主要体现在扩展高频阈值和噪声间隙测试结果上。我们的研究结果表明，即使传统测量的纯音阈值看似正常，耳蜗细微的外周听力损伤也会影响耳鸣患者的时间分辨率。
