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首页> 外文期刊>Trends in Hearing >Evaluation of a Method for Determining Binaural Sensitivity to Temporal Fine Structure (TFS-AF Test) for Older Listeners With Normal and Impaired Low-Frequency Hearing
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Evaluation of a Method for Determining Binaural Sensitivity to Temporal Fine Structure (TFS-AF Test) for Older Listeners With Normal and Impaired Low-Frequency Hearing

机译：确定听力正常和受损的老年听众对时间精细结构的双耳敏感性的方法（TFS-AF测试）的评估

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The ability to process binaural temporal fine structure (TFS) information was assessed using the TFS-AF test (where AF stands for adaptive frequency) for 26 listeners aged 60 years or more with normal or elevated low-frequency audiometric thresholds. The test estimates the highest frequency at which a fixed interaural phase difference (IPD) of ? (varied here between 30° and 180°) can be discriminated from an IPD of 0°, with higher thresholds indicating better performance. A sensation level of 30?dB was used. All listeners were able to perform the task reliably, giving thresholds well above the lowest allowed frequency of 30 Hz. The duration of a run averaged 5?min. Repeated testing of the normal-hearing listeners showed no significant practice effects. Thresholds varied markedly across listeners, but their ranking was fairly consistent across values of ?. Thresholds decreased (worsened) with decreasing ? and were lower than for a group of young listeners tested in an earlier study. There were weak to moderate, negative correlations between TFS-AF thresholds and audiometric thresholds at low frequencies (125–1000 Hz) but not at high frequencies (4000–8000 Hz). In conclusion, the TFS-AF test yielded a graded measure of binaural TFS sensitivity for all listeners. This contrasts with the TFS-LF (low-frequency) test, which measures the smallest detectable shift in IPD for a fixed frequency. The absence of practice effects and a reasonably short administration time make the TFS-AF test a good candidate for the assessment of sensitivity to changes in binaural TFS for older listeners without or with hearing loss.
机译：使用TFS-AF测试（其中AF代表自适应频率）对26岁，年龄在60岁或以上，具有正常或升高的低频听力阈值的听众进行评估，以评估其处理双耳颞精细结构（TFS）信息的能力。该测试估计固定的耳间相位差（IPD）为的最高频率。 （此处的变化范围是30°至180°）可以与0°的IPD区别开来，阈值越高表明性能越好。使用30？dB的感觉水平。所有听众都能够可靠地执行任务，其阈值远高于最低允许频率30 Hz。运行时间平均为5分钟。对听力正常的听众进行的反复测试未显示出明显的练习效果。阈值在听众之间明显不同，但在？值之间的排名相当一致。阈值随着减少而降低（恶化）？并低于早期研究中测试的一组年轻听众的水平。 TFS-AF阈值与听力阈值在低频（125–1000 Hz）而非高频（4000–8000 Hz）之间存在弱到中度的负相关。总之，TFS-AF测试为所有听众提供了双耳TFS敏感性的分级测量。这与TFS-LF（低频）测试形成对比，该测试测量固定频率下IPD的最小可检测到的偏移。由于没有实践效果，而且给药时间相当短，TFS-AF测试非常适合评估无听力障碍或有听力障碍的老年听众对双耳TFS变化的敏感性。

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