Effects of Expansion on Consonant Recognition and Consonant Audibility
Effects of Expansion on Consonant Recognition and Consonant Audibility
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DOI：
10.3766/jaaa.20.2.5
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发表时间：
2009-02-01
影响因子：
1.2
通讯作者：
Souza, Pamela
中科院分区：
文献类型：
--
作者：
Brennan, Marc;Souza, Pamela
背景：助听器扩展旨在降低低电平噪声的增益。然而，扩展也会降低低强度语音。虽然有人认为，扩大后的性能较差是由于可听度降低，但这并没有直接测量。此外，以前的研究使用相对较高的扩展kneepoints.Purpose：本研究比较了30 dB SPL和50 dB SPL扩展kneepoints.Research设计：8个辅音-元音音节，在50，60和71 dB SPL的影响。鼓膜附近的录音，每个语音标记，并用于计算辅助听力指数（AAI）。研究样本：13名受试者轻度至中度感音神经性听力损失。结果：扩展与高膝点导致减少辅音识别。在所有条件和subjects.Conclusion：如果辅音识别的优先级，听觉计算可以用来确定一个最佳的扩展拐点为一个给定的个人的AAI显着相关与辅音recognition。
Background: Hearing aid expansion is intended to reduce the gain for low-level noise. However, expansion can also degrade low-intensity speech. Although it has been suggested that the poorer performance with expansion is due to reduced audibility, this has not been measured directly. Furthermore, previous studies used relatively high expansion kneepoints.Purpose: This study compared the effect of a 30 dB SPL and 50 dB SPL expansion kneepoint on consonant audibility and recognition.Research Design: Eight consonant-vowel syllables were presented at 50, 60, and 71 dB SPL. Recordings near the tympanic membrane were made of each speech token and used to calculate the Aided Audibility Index (AAI).Study Sample: Thirteen subjects with mild to moderate sensorineural hearing loss.Results: Expansion with a high kneepoint resulted in reduced consonant recognition. The AAI correlated significantly with consonant recognition across all conditions and subjects.Conclusion: If consonant recognition is the priority, audibility calculations could be used to determine an optimal expansion kneepoint for a given individual.