International Journal of Aeronautical and Space Sciences
- 제2권2호
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- Pages.19-27
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- 2001
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- 2093-274X(pISSN)
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- 2093-2480(eISSN)
Acoustic Power Control of a Lightly-Damped Enclosed Sound Field
- Kim, Woo-Young (Department of Aerospace Eng. Chosun University) ;
- Kim, Dong-Kyu (Department of Aerospace Eng. Chosun University) ;
- Hwang, Won-Gul (Department of Mechanical Eng. Chonnam University)
- 발행 : 2001.11.01
초록
This research attempts to find an active control strategy which reduces acoustic power and acoustic energy in lightly-damped enclosed sound field such as a vehicle compartment or an operating room of heavy industrial machinery. An active control strategy, which takes into consideration of the acoustic radiation power of the source as a cost function, is formulated and examined to find capability of reducing noise. An adaptive filtering algorithm for sound power control is suggested and implemented to control lightly-damped sound field. To verify the method, sound power based active noise control algorithm was implemented on a rectangular box with lightly-damped wall, and popular acoustic energy based control with modal coupling reduction was performed to compare the noise reduction performance. It was shown that a total sound power based strategy provides a practical mean for global noise reduction for lightly damped sound field.