Impact of Hearing Aid Processing Delay on Stop Consonant Voicing Perception in Open Fittings.

IF 1.4 4区 医学 Q3 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY American Journal of Audiology Pub Date : 2024-09-03 Epub Date: 2024-08-06 DOI:10.1044/2024_AJA-24-00034
Petri Korhonen, Christopher Slugocki, Francis Kuk, Heidi Peeters
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Abstract

Purpose: Hearing aid (HA) processing delay results in asynchronous overlap of the input sound and the delayed amplified sound at the eardrum in open-ear fittings. This may distort the temporal cues used for stop-consonant voicing distinctions. The current study evaluated the impact of HA processing delay on voiced-voiceless categorization of syllable initial consonants /d/ and /t/ for a range of voice onset times (VOTs).

Method: Nineteen older listeners (Mage = 73 years) with mild-moderate sensorineural hearing loss participated. All listeners performed the voiced-voiceless categorization task in double-blind within-subjects design. Thirteen stimulus tokens along the /di:/ - /ti:/ continuum were created by varying VOTs. Stimuli were then processed using an HA simulator, which simulated the overall sound pressure levels measured at the eardrum in open-ear fittings with four processing delay times (0, 0.5, 5, and 8 ms). Individualized stimuli were generated for each listener based on their audiogram and presented via calibrated ear inserts at the most comfortable listening level. Performance across all VOT intervals was fitted with psychometric functions, which were then used to estimate the voiced-voiceless crossover point and the slope parameter for each simulated delay condition.

Results: The crossover point along the voiced-voiceless continuum shifted systematically with increased processing delay toward voiced /di:/ over unvoiced /ti:/ percepts. The shift in the crossover point between the 0-ms reference condition and the 8-ms processing delay condition corresponded to 5.8 ms of change in VOT. The 8-ms processing delay condition resulted in significantly shallower categorization slopes compared to the 0- and 0.5-ms delay conditions.

Conclusions: Temporal distortions created by HA processing delay in open-ear fittings impacted voicing perception of syllable initial stop-consonant stimuli near the voiced-voiceless crossover point. Short HA processing delay should be considered for open-ear fittings to preserve the natural VOT cues used for voicing detection.

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助听器处理延迟对开放式验配中停顿辅音发声感知的影响
目的:助听器(HA)的处理延迟会导致输入声与耳膜上的延迟放大声不同步重叠。这可能会扭曲用于区分停顿-共鸣发声的时间线索。本研究评估了 HA 处理延迟对一系列发声时间(VOTs)下音节首辅音 /d/ 和 /t/ 有声-无声分类的影响:19名患有轻度-中度感音神经性听力损失的老年听者(年龄=73岁)参加了此次测试。所有听者都在双盲受试者设计中完成了有声-无声分类任务。通过不同的 VOT,沿着 /di:/ - /ti:/ 连续统一体创建了 13 个刺激标记。然后使用 HA 模拟器对刺激进行处理,该模拟器模拟了在耳膜上测量到的整体声压级,并采用了四种处理延迟时间(0、0.5、5 和 8 毫秒)。根据每个听者的听力图为其生成个性化刺激,并通过校准耳塞以最舒适的听力水平呈现。用心理测量函数拟合所有 VOT 间期的表现,然后用这些函数估计有声-无声交叉点和每个模拟延迟条件的斜率参数:随着处理延迟的增加,有声-无声连续体的交叉点系统性地向有声/di:/和无声/ti:/知觉方向移动。在 0 毫秒参考条件和 8 毫秒处理延迟条件之间,交叉点的移动相当于 VOT 5.8 毫秒的变化。与 0 毫秒和 0.5 毫秒延迟条件相比,8 毫秒处理延迟条件导致的分类斜率明显较浅:结论:在开耳式试样中,HA 处理延迟造成的时间扭曲影响了有声-无声交叉点附近的音节初始停止-共鸣刺激的有声感知。应考虑在开耳式装置中使用较短的 HA 处理延迟,以保留用于发声检测的自然 VOT 线索。
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
American Journal of Audiology
American Journal of Audiology AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY-OTORHINOLARYNGOLOGY
CiteScore
3.00
自引率
16.70%
发文量
163
审稿时长
>12 weeks
期刊介绍: Mission: AJA publishes peer-reviewed research and other scholarly articles pertaining to clinical audiology methods and issues, and serves as an outlet for discussion of related professional and educational issues and ideas. The journal is an international outlet for research on clinical research pertaining to screening, diagnosis, management and outcomes of hearing and balance disorders as well as the etiologies and characteristics of these disorders. The clinical orientation of the journal allows for the publication of reports on audiology as implemented nationally and internationally, including novel clinical procedures, approaches, and cases. AJA seeks to advance evidence-based practice by disseminating the results of new studies as well as providing a forum for critical reviews and meta-analyses of previously published work. Scope: The broad field of clinical audiology, including audiologic/aural rehabilitation; balance and balance disorders; cultural and linguistic diversity; detection, diagnosis, prevention, habilitation, rehabilitation, and monitoring of hearing loss; hearing aids, cochlear implants, and hearing-assistive technology; hearing disorders; lifespan perspectives on auditory function; speech perception; and tinnitus.
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