Airoha Technology Corp is the world's second-largest supplier of Bluetooth chips, prominent in TWS earphones and OTC hearing aids. It's also a key player in fiber and fixed-line broadband, ranking third in GPS chip supply.

The aim of this study is to measure the key electroacoustic parameters required for medical-grade hearing aids, as outlined in ANSI S3.22 (2014), using Bluetooth true wireless earbuds as assistive devices. The evaluation aims to assess whether the specifications of these hearing devices comply with the electroacoustic standards for medical equipment applications and to confirm the fitting range for corresponding levels of hearing loss. Additionally, an assessment will be conducted for the efficacy or verification of the noise reduction algorithm, feedback cancellation algorithm, wide dynamic range compression (WDRC) algorithm, frequency-shifting algorithm, and impulse noise suppression algorithm implemented in this device.

Within this project, we designed a Mandarin consonant recognition test. This speech audiometry focused on high-frequency consonants as speech stimuli to investigate the impact of high-frequency hearing loss on speech perception. It evaluated functionalities related to high-frequency sound processing, such as fitting prescription and frequency-shifting algorithm, while validating their benefits.