Paccola Elaine Cristina Moreto, Costa Filho Orozimbo Alves, Jacob Regina Tangerino Souza
Division of Hearing Health, Hospital de Reabilitação de Anomalias Craniofaciais, Universidade de São Paulo, Bauru, SP, Brazil.
Department of Speech Therapy, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, SP, Brazil.
Int Arch Otorhinolaryngol. 2020 Sep 24;25(4):e483-e489. doi: 10.1055/s-0040-1714128. eCollection 2021 Oct.
A protocol has not yet been developed to perform electroacoustic measurements and behavioral tests to fit the frequency modulation (FM) system in bone conduction hearing aid (BCHA) users. Electroacoustic verification, with "FM transparency" achieved, ensures user audibility of FM transmitter and hearing aid signals. To propose and validate a protocol for electroacoustic verification of the FM system coupled to the BCHA. Twenty-four sets of FM system and BCHA were submitted to electroacoustic verification, using a receiver and a plastic adapter to connect the BCHA to a 2cc coupler in the hearing instrument analyzer. The measurements were performed in the acoustic box, at 65 dB sound pressure level (SPL), with International Speech Test Signal (ISTS), first to the BCHA microphone and then to the FM system microphone, to determine the transparency, in which equivalent inputs for both microphones result in equivalent outputs. The FM gain or volume has been adjusted to try to gain transparency for the outputs of the two input devices. Transparency was achieved for all sets evaluated, but in some combinations, adjustments to the FM receiver gain over the manufacturer's default setting were required. The proposed protocol proved to be effective for the electroacoustic verification of the FM system coupled to the BCHA.
尚未开发出一种协议来对骨传导助听器（BCHA）使用者的调频（FM）系统进行电声测量和行为测试。实现“FM透明度”的电声验证可确保用户能听到FM发射器和助听器信号。
目的是提出并验证一种用于耦合到BCHA的FM系统的电声验证协议。
使用接收器和塑料适配器将24套FM系统和BCHA连接到听力仪器分析仪中的2cc耦合器，进行电声验证。测量在声学箱中，声压级（SPL）为65dB时，使用国际语音测试信号（ISTS），先对BCHA麦克风，然后对FM系统麦克风进行测量，以确定透明度，即两个麦克风的等效输入产生等效输出。已调整FM增益或音量，试图使两个输入设备的输出获得透明度。
对所有评估的设备都实现了透明度，但在某些组合中，需要将FM接收器增益调整到超过制造商的默认设置。
所提出的协议被证明对耦合到BCHA的FM系统的电声验证是有效的。
