Margaret E Richter, Meredith A Rooth, Margaret T Dillon
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引用次数: 0
Abstract
Purpose: Cochlear implant (CI) recipients who listen with a hearing aid (HA) in the contralateral ear, known as bimodal listeners, demonstrate individual variability in speech recognition in noise. This variability may be due in part to differences in the processing delays of the CI and HA devices. This study investigated the influence of matching the processing delays of CI and HA devices on masked speech recognition for bimodal listeners.
Method: Twelve postlingually deafened adult CI recipients completed a task of masked speech recognition in two listening conditions: (a) independent default CI and HA processing delays (mismatched) and (b) with their HA-specific delay applied to the CI processing delay (matched). Speech recognition was evaluated with AzBio sentences presented in a 10-talker masker at a 0 dB SNR. The target was presented from the front loudspeaker at 0° azimuth, and the masker was co-located with the target, presented 90° toward the CI ear, or presented 90° toward the HA ear.
Results: There was a significant main effect for target-to-masker configuration, with better performance when the masker was spatially separated from the target. Better masked speech recognition was observed in the matched condition as compared to the mismatched condition.
Conclusion: Bimodal listeners may experience better masked speech recognition when the processing delay of the CI is individualized to match the processing delay of the contralateral HA.
目的：人工耳蜗（CI）受助者在对侧耳佩戴助听器（HA）的情况下进行聆听，即所谓的双模态聆听者，他们在噪声中的语音识别表现出个体差异。造成这种差异的部分原因可能是 CI 和助听器的处理延迟不同。本研究调查了匹配 CI 和 HA 设备的处理延迟对双模听者掩蔽语音识别的影响：12 名舌后失聪的成年 CI 接受者在两种听力条件下完成了掩蔽语音识别任务：(a) 独立的默认 CI 和 HA 处理延迟（不匹配）；(b) 将其 HA 特定延迟应用于 CI 处理延迟（匹配）。在信噪比为 0 dB 的情况下，用 10 个说话者掩蔽器中呈现的 AzBio 句子对语音识别进行评估。目标从方位角为 0° 的前置扬声器发出，掩蔽器与目标同位、朝向 CI 耳朵 90° 或朝向 HA 耳朵 90° 发射：目标到掩蔽器的配置存在明显的主效应，当掩蔽器与目标在空间上分离时，效果更好。与不匹配条件相比，匹配条件下的掩蔽语音识别效果更好：结论：当 CI 的处理延迟与对侧 HA 的处理延迟相匹配时，双模听者可能会有更好的掩蔽语音识别能力。补充材料：https://doi.org/10.23641/asha.27616845。
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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