CONTROL OF SOUND NOISE RADIATED FROM A PLATE USING DYNAMIC ABSORBERS UNDER THE OPTIMIZATION BY NEURAL NETWORK
✍ Scribed by K. Nagaya; L. Li
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 218 KB
- Volume
- 208
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
This paper reports a system for reducing sound radiated from a plate using electromagnetic vibration absorbers. Conventional design techniques for vibration absorbers are not appropriate for sound reduction absorbers, because higher-mode vibrations exert strong effects on noise. Hence, an analytical expression for noise level including higher modes has been first derived, then a method for obtaining optimal parameters for noise reduction absorbers is presented. In this method, an integrated value of the sound pressures in a frequency domain is taken as a cost function, and the parameters are decided by using a neural network procedure. An algorithm of the neural network for obtaining the parameters is given. Numerical calculations and experimental tests are carried out for some important cases.