Examining Force Level Output of Skin-Drive Bone Conduction Hearing Devices in Adults With Simulated Conductive Hearing Loss.

IF 1.4 4区 医学 Q3 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY American Journal of Audiology Pub Date : 2024-09-03 Epub Date: 2024-05-13 DOI:10.1044/2024_AJA-23-00258
Rana El-Naji, Susan Scollie, Marlene Bagatto
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Abstract

Purpose: Bone conduction hearing devices (BCDs) that deliver sound across the skin (i.e., transcutaneous) are suitable for some individuals who have conductive or mixed hearing losses. Prescriptive targets for percutaneous devices are available, for example, from the Desired Sensation Level-Bone Conduction Hearing Device (DSL-BCD) algorithm. These targets, however, may require modification for use with transcutaneous BCDs. The current study investigated three key variables that may inform target modification: (a) comparison of thresholds measured using an audiometric bone conduction (BC) transducer versus transcutaneous BCDs that offer in situ threshold measurement, (b) transcutaneous BCD default force level outputs versus recommended DSL percutaneous BC targets, and (c) the preferred listening levels (PLLs) of adults wearing transcutaneous BCDs in a laboratory setting.

Method: Bilateral conductive hearing loss was simulated in 20 normal-hearing adults via earplugs. Thresholds were measured using a B-71 BC transducer and two commercially available BCDs coupled to a soft headband. DSL percutaneous BC targets were generated, and PLLs were obtained for a 60-dB SPL speech stimulus. Force level outputs were measured using a skull simulator on the Audioscan Verifit2 at the hearing aids' default settings and at the participants' PLL for each device.

Results: On average, audiometric BC thresholds were significantly better than those measured in situ with each BCD. PLLs were similar to prescribed targets for one device with the smoother response shape and agreed in the high frequencies for both devices.

Conclusions: In situ thresholds are significantly higher than audiometric BC thresholds, suggesting that device-based in situ measurement more accurately accounts for the signal transmission from transcutaneous BCDs. PLLs differed from the percutaneous targets and varied between devices, which may indicate that either target modifications or manipulations of device frequency response shaping are needed to approximate PLL with transcutaneous BCD devices.

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在模拟传导性听力损失的成年人中检验皮肤驱动骨传导助听器的力级输出。
目的:通过皮肤(即经皮)传递声音的骨导听力设备(BCD)适用于某些传导性或混合性听力损失的患者。经皮设备的规定目标可从 "期望感觉水平-骨导听力设备(DSL-BCD)"算法中获得。然而,这些目标可能需要修改才能用于经皮 BCD。目前的研究调查了三个关键变量,这些变量可能会为目标的修改提供参考:(a)使用测听骨导(BC)传感器测量的阈值与提供原位阈值测量的经皮BCD的比较;(b)经皮BCD默认力水平输出与推荐的DSL经皮BCD目标的比较;以及(c)在实验室环境中佩戴经皮BCD的成年人的首选听力水平(PLL):方法:通过耳塞模拟 20 名听力正常的成年人的双侧传导性听力损失。使用 B-71 BC 传感器和两个与软头带相连的市售 BCD 测量阈值。生成了 DSL 经皮 BC 目标,并获得了 60 分贝 SPL 语言刺激的 PLL。使用 Audioscan Verifit2 上的头骨模拟器,以助听器的默认设置和参与者的 PLL 对每个设备的力水平输出进行了测量:平均而言,每种 BCD 的听力 BC 阈值都明显优于原位测量值。其中一种设备的 PLL 与规定目标相似,响应形状更平滑,两种设备的高频一致:原位阈值明显高于听力测定的 BC 阈值,这表明基于设备的原位测量能更准确地反映经皮 BCD 的信号传输。PLL 与经皮目标值不同,不同设备之间也存在差异,这可能表明需要对目标值进行修改或对设备频率响应整形进行操作,以接近经皮 BCD 设备的 PLL。
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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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