可聴骨伝導を併用した超音波ヘッドホン

Translated title of the contribution: Ultrasonic earphone system combined with audible band bone conduction vibration

岡本 学, 三好 正人, 片岡 章俊, 岩宮 眞一郎

Research output: Contribution to journalArticle

Abstract

When a listener's tragus is vibrated by ultrasound with amplitude modulation of audible sound, an audible sound is perceived. We have been developing an ultrasound earphone based on this interesting phenomenon. We consider that audible sound can be produced by the ultrasound transmitted from an actuator to the external auditory canal. This earphone reproduces a sufficiently loud high-frequency band sound. On the other hand, it cannot reproduce low-frequency band sound. A bone conduction earphone that actuates facial bones by audible band vibration easily leaks sound to the air in the high-frequency band. We propose a hybrid ultrasonic earphone system combined with audible band bone conduction vibration. This system enables an earphone to transmit sound that is not close to a listener's ears, and sound leakage is small. We report the structure of this system and this characteristic.
Original languageJapanese
Pages (from-to)25-30
Number of pages6
JournalIEICE technical report
Volume105
Issue number403
Publication statusPublished - Nov 17 2005

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岡本学, 三好正人, 片岡章俊, & 岩宮眞一郎 (2005). 可聴骨伝導を併用した超音波ヘッドホン. IEICE technical report, 105(403), 25-30.