ABSTRACT

External auditory canal (EAC) resonance occurs in the closed-end of a tube near the ear drum. However, the gain of EAC resonance cannot be measured because it occurs inside the human body. Real ear unaided responses (REURs) include both the acoustic reflection of the pinna, skull, torso and the resonance gain of the external ear. The concha cavity resonance (CC resonance) can be measured if EAC is obstructed. Therefore, EAC resonance can be calculated by subtracting the CC resonance from REURs. The aim of this study is to find the gain of the EAC resonance in normal Korean adults and provide the basic information for hearing aid fitting and further research in the field of audiological rehabilitation. Twenty-none normal adults (58-ears) participated in this study. The frequency range of EAC resonance was observed from 800㎐ to 4,000㎐ at 0˚ and from 600㎐ to 3,700㎐ at 45˚. The maximum resonance frequency was recorded at 2,619(±288.7)㎐ at azimuth 0˚ and 2,613.8(±381.8)㎐ at azimuth 45˚. The mean of maximum resonance gain was recorded at 13.2(±3.5)㏈ and 12.3(±3.4)㏈, respectively.

KEYWORD

Audiological rehabilitation, real ear unaided response, external auditory canal resonance, concha cavity resonance, hearing aids fitting

REFERENCES(7)open

  1. [jounal] 장철호 / 1999 / 유양동 폐쇄술이 외이도 공명주파수에 미치는 영향 / 대한이비인후과학회지 42 (12) : 1501 ~ 1504

  2. [jounal] 조양선 / 1999 / 소아 장액성 중이염 환자에서 환기관 삽관 후 외이도 공명의 변화 / 대한이비인후과학회지 42 (1) : 13 ~ 16

  3. [jounal] 최아현 / 2009 / 외이도용적에 따른 외이도공명의 변화 / 말소리와 음성과학 1 (3) : 151 ~ 154

  4. [jounal] 허승덕 / 2010 / 이개 크기에 따른 이개강 공명 / Communication Sciences and Disorders 15 (1) : 107 ~ 113

  5. [book] Chasin, M. / 1997 / The acoustics of CIC hearing aids. In: Chasin M. CIC Handbook / Singular Publishing Group, Inc

  6. [book] Dillon, H. / 2001 / Hearing Aids / Thieme : 89 ~ 96

  7. [book] Gustav-Mueller, H. / 1998 / Audiologists Desk Reference Volume Ⅱ / Singular Publishing Group, Inc