| Presentation | 2008-10-24 Influence of Transmission Rod of Earplug Type Transducer on Demodulated Audible Sound from Amplitude Modulation Ultrasonic Yoshifumi SHINFUKU, Kenji FURIHATA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a previous paper, an earplug type earphone by contact with an ultrasonic transducer was proposed. The earplug type earphone is composed of a versatile earplug and an ultrasonic transducer contacting a transmission rod, which transmits mechanical amplitude modulation ultrasonic vibrations (modified double side band; MDSB) to the earplug, and therefore can produce audible sound demodulated sound pressure directly in the small cavity enclosed by the earplug and one's eardrum. This paper has been experimentally discussed the relation between the acoustic characteristics of the earplug type earphone and adjusting the proper thickness and diameter of the vibration transmission rod for four kinds of materials (polyvinyl chloride, cork, chamaecyparis obtusa, and expanded poly styrene). From the results, in case of chamaecyparis obtusa 20mm thick, it can be found that, this earphone is obtained nearly flat frequency characteristics 75dB±2dB (SPL) in the range from 315Hz to 2kHz (an input voltage is 15V_ |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Earplug type earphone / Ultrasonic / Earplug / Amplitude modulation |
| Paper # | EA2008-81 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2008/10/16(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) | Influence of Transmission Rod of Earplug Type Transducer on Demodulated Audible Sound from Amplitude Modulation Ultrasonic |
| Sub Title (in English) | |
| Keyword(1) | Earplug type earphone |
| Keyword(2) | Ultrasonic |
| Keyword(3) | Earplug |
| Keyword(4) | Amplitude modulation |
| 1st Author's Name | Yoshifumi SHINFUKU |
| 1st Author's Affiliation | Faculty of Engineering, Shinshu University /() |
| 2nd Author's Name | Kenji FURIHATA |
| 2nd Author's Affiliation | |
| Date | 2008-10-24 |
| Paper # | EA2008-81 |
| Volume (vol) | vol.2008 |
| Number (no) | 255 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |