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Audiology and Speech Research > Volume 12(4); 2016 > Article
Audiology and Speech Research 2016;12(4): 221-226.
Published online: October 31, 2016.
doi: http://doi.org/10.21848/asr.2016.12.4.221
골도 청력검사에서 이간감약의 임상적평가
이재석, 홍석민, 김성균, 김희진, 홍석진, 박일석, 김용복, 심민경, 금보람
한림대학교 의과대학 동탄성심병원 이비인후과학교실
Clinical Evaluation of Transcranial Attenuation in Bone Conduction Audiometry
Jae Suk Lee, Seok Min Hong, Sung Kyun Kim, Hee Jin Kim, Seok jin Hong, Il Seok Park, Yong Bok Kim, Min Gyeong Shim, Bo Ram Keum
Department of Otolaryngology-Head & Neck Surgery, Hallym University College of Medicine, Dongtan Sacred Heart Hospital, Hwaseong, Korea
Correspondence  Seok Min Hong ,Tel: +82-31-8086-2677, Fax: +82-31-8086-2681, Email: thecell@hallym.or.kr
Received: September 6, 2016; Revised: September 27, 2016   Accepted: October 11, 2016.  Published online: October 31, 2016.
It is commonly known that there is no significant transcranial attenuation across the cranium through bone conduction. The aim of this study was to evaluate transcranial attenuation for bone conduction as a function of each frequency by hearing loss types on subjects of unilateral hearing loss or unilateral with bilateral hearing loss.
A total of 82 subjects with sensorineural (40 ears), conductive (20 ears) and mixed hearing loss (22 ears), were enrolled and then were analyzed prospectively. The transcranial attenuation was analyzed for 82 ears with the differences over 10 dB HL in all frequencies (0.25-4 kHz) by air conduction audiometry. The transcranial attenuation at each frequency was obtained by bone conduction threshold without masking.
We observed a significant in the mean of transcranial attenuation for bone conduction of the overall subjects. It was closed to 0-9 dB HL at 0.25 kHz to 2 kHz and 13 dB HL at 3 to 4 kHz. There are more difference in principal the transcranial attenuation for bone conduction in high frequency than a low frequency.
Therefore, the conductive and mixed hearing loss always need to consider about the masking by crosshearing. The cross-hearing, however, needs to consider by type of hearing loss because the transcranial attenuation of bone conduction as a function of each frequency depends on hearing loss types. Further research should work for the transcranial attenuation of bone conduction by degrees of hearing loss.
Key Words: Bone conduction audiometry, Hearing loss type, Transcranial attenuation.
중심단어: 골도청력검사· 청력손실 종류· 이간감약
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