| Presentation | 2002/1/18 Bone conduction earphone using ultrasound vibration Manabu OKAMOTO, Masato MIYOSHI, Hiroshi HOSOI, Takefumi SAKAGUCHI, Yoshiaki WATANABE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This article proposes a novel bone conduction earphone based on an interesting phenomenon that audible sound is perceived when the ultrasonic vibration modulated by the sound is given to tragus of a listener. The earphone comprises an amplifier that modulates ultrasound with audible sound signal, and an ultrasonic piezoelectric actuator. The frequency characteristics of the audible sound given by the earphone are examined through a subjective loudness balance test as well as the measurement of the sound in external ear canals of one with normal hearing and the other with hearing difficulties. The results show that the level of the audible sound is in proportion to the power of the frequency. Moreover, the audible sound seems to be produced by the nonlinear demodulation somewhere in the ultrasound transmission from the tragus to the external ear canal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Bone conduction earphone / Ultrasound / Hearing / Nonlinear / Sound in external auditory canal |
| Paper # | 2001-US-104,2001-EA-118 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2002/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Bone conduction earphone using ultrasound vibration |
| Sub Title (in English) | |
| Keyword(1) | Bone conduction earphone |
| Keyword(2) | Ultrasound |
| Keyword(3) | Hearing |
| Keyword(4) | Nonlinear |
| Keyword(5) | Sound in external auditory canal |
| 1st Author's Name | Manabu OKAMOTO |
| 1st Author's Affiliation | NTT Cyber Space Laboratories() |
| 2nd Author's Name | Masato MIYOSHI |
| 2nd Author's Affiliation | NTT Cyber Space Laboratories |
| 3rd Author's Name | Hiroshi HOSOI |
| 3rd Author's Affiliation | The Department of Otorhinolaryngology, Nara Medical University |
| 4th Author's Name | Takefumi SAKAGUCHI |
| 4th Author's Affiliation | Faculty of Engineering, Doshisha University |
| 5th Author's Name | Yoshiaki WATANABE |
| 5th Author's Affiliation | Faculty of Engineering, Doshisha University |
| Date | 2002/1/18 |
| Paper # | 2001-US-104,2001-EA-118 |
| Volume (vol) | vol.101 |
| Number (no) | 598 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |