ダウンロード数 : ?
ID 38394
ファイル
言語
英語
著者
Nishimura, Tadashi
Hosoi, Hiroshi
Saito, Osamu
Miyamae, Ryosuke
下倉 良太 奈良県立医科大学
Matsui, Toshie
Yamanaka, Toshiaki
Kitahara, Tadashi
Levitt, Harry
内容記述(抄録等)
Objective: By attaching a transducer to the aural cartilage, a relatively loud sound is audible even with a negligibly small fixation force. Previous study has identified several pathways for sound transmission by means of cartilage conduction. This investigation focused on the relative contribution of direct vibration of the aural cartilage to sound transmission in an open and in an occluded ear.
Methods: Thresholds with and without an earplug were compared for three experimental conditions: the transducer being placed on the tragus, pretragus, and mastoid. Eight volunteers with normal hearing participated.
Results: The thresholds increased with distance of the transducer from the ear canal (tragus, pretragus, mastoid, in that order). The differences were statistically significant for all conditions except for the occluded ear at 4 kHz. With the earplug inserted, the thresholds for the tragus condition were most sensitive below 2 kHz, indicating a significant contribution of direct vibration of the aural cartilage.
Conclusion: Direct vibration of the aural cartilage can enhance sound transmission. At low frequencies, cartilage conduction can deliver sound efficiently across a blockage in the ear canal. Stray airborne sound radiating from the transducer dominates cartilage conduction in the open ear at high frequencies.

主題
Air conduction
Bone conduction
Occlusion effect
Aural cartilage
Cartilage-air
Cartilage-bone
Direct-air
Tragus
掲載誌名
Auris Nasus Larynx
42
1
開始ページ
15
終了ページ
19
ISSN
03858146
発行日
2015-02
DOI
DOI公開日
2017-02-07
NCID
AA11522116
出版者
Elsevier
資料タイプ
学術雑誌論文
ファイル形式
PDF
権利関係
© 2014 Elsevier Ireland Ltd. All rights reserved.
著者版/出版社版
著者版
業績ID
e29895
部局
他機関