Global Active Noise Control Using a Delayed Driving Parametric Array Loudspeaker
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- ISHIMORI Akiyoshi
- Tokyo Metropolitan Univ. Dept. of Aerospace Engineering
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- 田中 信雄
- 首都大学東京 システムデザイン学部
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- 岩本 宏之
- 首都大学東京 システムデザイン学部
Bibliographic Information
- Other Title
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- 遅延駆動パラメトリックアレイスピーカによる広域能動騒音制御
Abstract
Arguably, noise suppression via active noise control is effective only within a fraction of the noise wavelength from an error sensor location. To expand the controllable region, it is a common practice to introduce the multi-channelization of a control system or sound power control of a noise source per se. It is also true, however, that they entail the following disadvantages: the multi-channelization causes complication, destabilization and increment of the computational burden; control sound sources need placing close enough to the noise source to achieve sound power control, hence impracticable. To overcome the disadvantages mentioned above, this paper presents a global active noise control method using a parametric array loudspeaker (PAL). Driving the ultrasonic transducers comprising PAL with a proper time delay enables one to produce the wavefront of control sound similar to that of noise, thereby suppressing a noise propagation in the vicinity of the noise source, resulting in the generation of a global zone of quite. The validity of the method presented is then clarified numerically as well as experimentally.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 79 (799), 604-616, 2013
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001206386539648
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- NII Article ID
- 130003374953
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- ISSN
- 18848354
- 03875024
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed