Paper Abstract and Keywords |
Presentation |
2004-12-10 10:20
Acoustic characteristics of mobile parametric loudspeaker prototype Yusuke Nakashima, Takeshi Yoshimura, Tomoyuki Ohya (NTT DoCoMo) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Acoustic characteristics of a mobile-phone-size super-directional loudspeaker prototype are reported. The prototype is equipped with two sets of parametric loudspeakers, which emits narrow ultrasonic beam to be demodulated into audible frequency by the nonlinearity of the air. With amplitude modulated sine wave of an audible frequency by ultrasonic carrier wave, we confirm the audible sound pressure above 70dBSPL at the distance of 50cm, and also confirm the high directivity of the sound field. With the small-size super-directional loudspeaker, it is possible to provide a personal sound field for hands-free playback in mobile environments. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
super-directional loudspeaker / parametric array loudspeaker / mobile communications / hands-free playback / mobile phone / / / |
Reference Info. |
IEICE Tech. Rep., vol. 104, no. 497, EA2004-105, pp. 13-18, Dec. 2004. |
Paper # |
EA2004-105 |
Date of Issue |
2004-12-03 (EA) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
EA |
Conference Date |
2004-12-10 - 2004-12-10 |
Place (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
EA |
Conference Code |
2004-12-EA |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Acoustic characteristics of mobile parametric loudspeaker prototype |
Sub Title (in English) |
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Keyword(1) |
super-directional loudspeaker |
Keyword(2) |
parametric array loudspeaker |
Keyword(3) |
mobile communications |
Keyword(4) |
hands-free playback |
Keyword(5) |
mobile phone |
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1st Author's Name |
Yusuke Nakashima |
1st Author's Affiliation |
NTT DoCoMo, Inc. (NTT DoCoMo) |
2nd Author's Name |
Takeshi Yoshimura |
2nd Author's Affiliation |
NTT DoCoMo, Inc. (NTT DoCoMo) |
3rd Author's Name |
Tomoyuki Ohya |
3rd Author's Affiliation |
NTT DoCoMo, Inc. (NTT DoCoMo) |
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Speaker |
Author-1 |
Date Time |
2004-12-10 10:20:00 |
Presentation Time |
25 minutes |
Registration for |
EA |
Paper # |
EA2004-105 |
Volume (vol) |
vol.104 |
Number (no) |
no.497 |
Page |
pp.13-18 |
#Pages |
6 |
Date of Issue |
2004-12-03 (EA) |