Enhancing sound pressure output in graphene-based hybrid bone conduction hearing aids through electromagnetic and electrostatic integration  

作　　者：Dong-Kwan Lee Hyunwoo Baek Byung-Ho Kang § Jongchan Yoo Kun-Woo Nam Sang Hyun Lee Illsoo Sohn Eunjung Han June Choi Sung-Hoon Park 

机构地区：[1]Department of Mechanical Engineering,Soongsil University,Seoul 06978,Republic of Korea [2]Department of Otorhinolaryngology-Head and Neck Surgery,Korea University College of Medicine,Ansan Hospital,Ansan 15355,Republic of Korea [3]School of Electrical Engineering,Korea University,Seoul 02841,Republic of Korea [4]Department of Computer Science and Engineering,Seoul National University of Science and Technology,Seoul 01811,Republic of Korea

出　　处：《Nano Research》2025年第4期425-434,共10页纳米研究(英文版)

基　　金：supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP)and the Ministry of Trade,Industry&Energy(MOTIE)of Republic of Korea(No.RS-2024-00398166);supported by a grant from Korea University and the Basic Science Research Program of the National Research Foundation of Korea(No.2022R1I1A2072826);supported in part by the National Research Foundation of Korea(NRF)grant funded by the Korean Government(MSIT)(No.2022R1A5A1027646).

摘　　要：Bone conduction hearing aids(BCHA)actively serve patients with conductive hearing loss or external auditory canal problems,including auditory canal atresia,ossicular dislocation,etc.They are typically categorized into surgically implanted devices,embedded directly into the skull,and adhesive devices,which transmit sound through the skin.The latter are advantageous for being noninvasive and suitable for children under five.However,adhesive devices,due to their sound transmission method,require enhanced sound output performance compared to implanted devices.Graphene,known for its low mass density yet excellent mechanical and electrical properties,finds application in various electronic fields.Currently,it serves as a diaphragm in electroacoustic transducers,enabling stable vibrations across broad frequency ranges.The electroacoustic transducers of BCHA are typically driven by electromagnetic methods,which may be effective in low-frequency ranges but not in high-frequency ranges.This study successfully introduced a hybrid approach that combines the complementary advantages of both electromagnetic and electrostatic modes by utilizing a graphene sheet as the diaphragm for a hybrid graphene BCHA.The electrostatic mode,which performs better in highfrequency ranges compared to the electromagnetic mode,was implemented in this hybrid structure.According to the measured frequency response data,the hybrid mode showed up to an 11 dB improvement compared to the electromagnetic mode and up to a 21 dB improvement compared to the electrostatic mode,exhibiting a relatively flat shape over a wide frequency range.Subsequently,the device’s effectiveness as a BCHA is confirmed through experiments on rabbits,showcasing its potential in auditory aid advancement.

关 键 词：GRAPHENE bone conduction hearing aid LOUDSPEAKER frequency response 

分 类 号：R318[医药卫生—生物医学工程]