Directional Sound Radiation System Using a Large Planar Diaphragm Incorporating Multiple Vibrators
Summary :
In this paper, we propose a new system for controlling radiated sound directivity. The proposed system artificially induces a bending vibration on a planar diaphragm by vibrating it artificially using multiple vibrators. Because the bending vibration in this case is determined by not one but all of the accelerated vibrations, the vibration of the diaphragm can be controlled by modulating the accelerated vibration waveforms relatively for each frequency. As a consequence, the directivity of the radiated sound is also varied. To investigate the feasibility of this system, we constructed a prototype that has for a diaphragm a circular plate-one of the most typical shapes considered for discussing plate vibration-and three vibrators. The measurement data showed visually that with this system, surface vibration and sound directivity change depending on the phases of the accelerated vibrations.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.6 pp.1399-1407
- Publication Date
- 2009/06/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E92.A.1399
- Type of Manuscript
- PAPER
- Category
- Engineering Acoustics
Authors
Keyword
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Yoko YAMAKATA, Michiaki KATSUMOTO, Toshiyuki KIMURA, "Directional Sound Radiation System Using a Large Planar Diaphragm Incorporating Multiple Vibrators" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 6, pp. 1399-1407, June 2009, doi: 10.1587/transfun.E92.A.1399.
Abstract: In this paper, we propose a new system for controlling radiated sound directivity. The proposed system artificially induces a bending vibration on a planar diaphragm by vibrating it artificially using multiple vibrators. Because the bending vibration in this case is determined by not one but all of the accelerated vibrations, the vibration of the diaphragm can be controlled by modulating the accelerated vibration waveforms relatively for each frequency. As a consequence, the directivity of the radiated sound is also varied. To investigate the feasibility of this system, we constructed a prototype that has for a diaphragm a circular plate-one of the most typical shapes considered for discussing plate vibration-and three vibrators. The measurement data showed visually that with this system, surface vibration and sound directivity change depending on the phases of the accelerated vibrations.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.1399/_p
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@ARTICLE{e92-a_6_1399,
author={Yoko YAMAKATA, Michiaki KATSUMOTO, Toshiyuki KIMURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Directional Sound Radiation System Using a Large Planar Diaphragm Incorporating Multiple Vibrators},
year={2009},
volume={E92-A},
number={6},
pages={1399-1407},
abstract={In this paper, we propose a new system for controlling radiated sound directivity. The proposed system artificially induces a bending vibration on a planar diaphragm by vibrating it artificially using multiple vibrators. Because the bending vibration in this case is determined by not one but all of the accelerated vibrations, the vibration of the diaphragm can be controlled by modulating the accelerated vibration waveforms relatively for each frequency. As a consequence, the directivity of the radiated sound is also varied. To investigate the feasibility of this system, we constructed a prototype that has for a diaphragm a circular plate-one of the most typical shapes considered for discussing plate vibration-and three vibrators. The measurement data showed visually that with this system, surface vibration and sound directivity change depending on the phases of the accelerated vibrations.},
keywords={},
doi={10.1587/transfun.E92.A.1399},
ISSN={1745-1337},
month={June},}
Copy
TY - JOUR
TI - Directional Sound Radiation System Using a Large Planar Diaphragm Incorporating Multiple Vibrators
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1399
EP - 1407
AU - Yoko YAMAKATA
AU - Michiaki KATSUMOTO
AU - Toshiyuki KIMURA
PY - 2009
DO - 10.1587/transfun.E92.A.1399
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 6
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - June 2009
AB - In this paper, we propose a new system for controlling radiated sound directivity. The proposed system artificially induces a bending vibration on a planar diaphragm by vibrating it artificially using multiple vibrators. Because the bending vibration in this case is determined by not one but all of the accelerated vibrations, the vibration of the diaphragm can be controlled by modulating the accelerated vibration waveforms relatively for each frequency. As a consequence, the directivity of the radiated sound is also varied. To investigate the feasibility of this system, we constructed a prototype that has for a diaphragm a circular plate-one of the most typical shapes considered for discussing plate vibration-and three vibrators. The measurement data showed visually that with this system, surface vibration and sound directivity change depending on the phases of the accelerated vibrations.
ER -
English
