The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Neste artigo, propomos um novo sistema para controlar a diretividade do som irradiado. O sistema proposto induz artificialmente uma vibração de flexão em um diafragma planar, vibrando-o artificialmente usando múltiplos vibradores. Como a vibração de flexão neste caso é determinada não por uma, mas por todas as vibrações aceleradas, a vibração do diafragma pode ser controlada modulando as formas de onda de vibração acelerada relativamente para cada frequência. Como consequência, a diretividade do som irradiado também varia. Para investigar a viabilidade deste sistema, construímos um protótipo que tem como diafragma uma placa circular - uma das formas mais típicas consideradas para discutir a vibração da placa - e três vibradores. Os dados de medição mostraram visualmente que, com este sistema, a vibração da superfície e a diretividade do som mudam dependendo das fases das vibrações aceleradas.
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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},}
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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 -