The Study of Bone Vibrator Positions : Normal Hearing and
Conductive and Sensorineural Hearing Loss

Lee, Seung Chul; Kim, Jinsook

doi:2007.3.2.139

Audiol > Volume 3(2); 2007 > Article

Research Paper

Audiology 2007;3(2): 139-144.
Published online: December 31, 2007.
doi: http://doi.org/10.21848/audiol.2007.3.2.139

골진동자 장착위치에 따른 역치 연구 : 정상인, 전음성난청, 감각신경성난청

이승철¹, 김진숙²

¹한림대학교 보건대학원 재활학과
²한림대학교 자연과학대학 언어청각학부, 청각언어연구소

The Study of Bone Vibrator Positions : Normal Hearing and Conductive and Sensorineural Hearing Loss

Seung Chul Lee¹, Jinsook Kim²

¹Graduate School of Public health, Hallym University, Chuncheon, Korea
²Section of Audiology and Audiology & Speech Pathology Research Institute, Hallym University, Chuncheon, Korea

Correspondence

Jinsook Kim ,Tel: (033)248-2213, Fax: (033)-256-3420, Email: jskim@hallym.ac.kr

Received: July 26, 2007; Accepted: November 4, 2007. Published online: December 31, 2007.

ABSTRACT

This study was explored utilizing both forehead and mastoid positions of bone oscillators in order to verify the clinical effectiveness on positions of bone oscillators. Sixty adults, 20 (40 ears) with normal hearing, 20 (40 ears) with conductive hearing loss and 20(40 ears) with sensorineural hearing loss participated in the study. Pure tone audiometry was performed with air conduction (AC), bone conduction at mastoid (BCm), and bone conduction at forehead (BCf) thresholds. The results of this study were as follows : 1) Comparison among transducers, the thresholds of AC, BCm and BCf, showed statistical significance at three groups. 2) The threshold difference of three transducers in three groups showed statistical significance except AC-BCf of normal hearing and sensorineural hearing loss groups. 3) The threshold difference of BCf-BCm at normal hearing, conductive hearing loss, and sensorineural hearing loss groups were 10.1, 7.4, 7.4 dB, respectively. 4) Considering the lowest threshold at BCm, less BCf-BCm threshold difference in conductive hearing loss and frequency characteristics of BCf-BCm threshold difference, the forehead position is less influenced by osseotympanic bone conduction and inertial bone conduction than the mastoid position. It seems that forehead placement is more suitable for inner ear measurement than mastoid placement. However, the data in this study are limited in providing the standardized force for the forehead measurement and more data should be collected for better understanding of bone conduction mechanism.

Key Words: Bone conduction, Forehead, Mastoid

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