Derived-band auditory brainstem responses: cochlear contributions determined by narrowband maskers.

IF 1.8 3区医学 Q2 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY

International Journal of Audiology Pub Date : 2024-08-01 Epub Date: 2023-06-28 DOI:10.1080/14992027.2023.2227342

David R Stapells, Maxine R Fok

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引用次数: 0

Abstract

Objective: The present study sought to determine the cochlear frequency regions represented by Auditory Brainstem Responses (ABRs) obtained using the high-pass noise/derived response (HP/DR) technique.

Design: Broadband noise sufficient to mask the ABR to 50 dB nHL clicks was HP filtered (96 dB/oct) at 8000, 4000, 2000, 1000 and 500 Hz. Mixed with the clicks and HP noise masker was narrowband noise. Three derived response bands, denoted by the upper and lower high-pass noise frequencies, were obtained: DR4000-2000, DR2000-1000, and DR1000-500.

Study sample: Ten adults with normal hearing, aged 19-27 years (mean age: 22.4 years), were recruited from the community.

Results: Frequencies contributing to each DR were determined from the wave V percent amplitude (or latency shift) vs narrowband masker frequency profiles (relative to a no-narrowband-noise condition). Overall, results indicate derived band centre frequencies were closer to the lower HP cut-off frequencies for DR4000-2000 and DR2000-1000, and approximately halfway between the lower HP cut-off and the geometric mean of the two HP frequencies for DR1000-500, with bandwidths of 0.5-1 octave in width.

Conclusions: These results confirm the validity of the HP/DR technique for assessing narrow cochlear regions (≤1.0 octave wide), with centre frequencies within ½-octave of the lower HP frequency.

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衍生带听觉脑干反应：窄带掩蔽器确定的耳蜗贡献。

目的：本研究旨在确定使用高通噪声/衍生反应（HP/DR）技术获得的听觉脑干反应（ABR）所代表的耳蜗频率区域：本研究旨在确定使用高通噪声/衍生反应（HP/DR）技术获得的听性脑干反应（ABR）所代表的耳蜗频率区域：设计：对频率为 8000、4000、2000、1000 和 500 Hz 的宽带噪声进行 HP 滤波（96 dB/oct），使其足以将 ABR 屏蔽到 50 dB nHL 点击声。与单击声和 HP 噪声掩蔽器混合的是窄带噪声。得到了三个衍生响应带，分别用上下高通噪声频率表示：研究样本：研究样本：从社区招募了 10 名听力正常的成年人，年龄在 19-27 岁之间（平均年龄：22.4 岁）：根据波 V 百分比振幅（或潜伏期偏移）与窄带掩蔽器频率曲线（相对于无窄带噪声条件）确定了每种 DR 的频率。总体而言，结果表明 DR4000-2000 和 DR2000-1000 的导出频带中心频率更接近于较低的 HP 截止频率，而 DR1000-500 的导出频带中心频率大约介于较低的 HP 截止频率和两个 HP 频率的几何平均值之间，带宽宽度为 0.5-1 倍频程：这些结果证实了 HP/DR 技术在评估窄耳蜗区域（≤1.0 倍频程宽）时的有效性，其中心频率在 HP 下限频率的 ½ 倍频程范围内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Audiology 医学-耳鼻喉科学

CiteScore

4.90

自引率

14.80%

发文量

133

审稿时长

4-8 weeks

期刊介绍： International Journal of Audiology is committed to furthering development of a scientifically robust evidence base for audiology. The journal is published by the British Society of Audiology, the International Society of Audiology and the Nordic Audiological Society.