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Active Boom Noise Control
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English
Abstract
Due to the limited effectiveness of sound absorbing material at low frequencies the first (first few) acoustic mode(s) of enclosures, the size of automobile cabins, are very difficult to damp, resulting in the boom noise problem. The use of one or a bank of Helmholtz resonators for increasing the absorption in automobile cabins has been studied by different researchers. This approach is effective, but the large size of the resonators (due to the low frequencies they are tuned for) makes their use rather prohibitive. This has led to the use of active noise control, to add damping to the first (or first few) acoustic modes by nearly-collocating a microphone with a volumetric source (speaker) in the acoustic field and employing appropriate feedback compensators. Significant levels of low-frequency, global acoustic damping can be achieved in enclosures such as automobile cabins, with the proposed feedback control schemes.
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Citation
Kashani, R. and Naastad, D., "Active Boom Noise Control," SAE Technical Paper 971887, 1997, https://doi.org/10.4271/971887.Also In
References
- Clark, R. L. Cole, D. G. 1995 Active damping of enclosed sound fields through direct rate feedback control J. of the Acoustical Society of America 97 3 1710 16
- Dohner, J. L. Shoureshi, R. 1989 Modal control of acoustic plants J. ofVibration, Acoustics, Stress, and Reliability in Design 111 326 330
- Freymann, R. 1989 Passive and active damping augmentation systems in the fields of structural dynamics and acoustics AIAA Publication No. 89-1196-CP
- Kinsler, L. E. Frey, A. R. 1962 Fundamentals of Acoustics JOHN WILEY & SONS New York
- Meirovitch, L. 1967 “Analytical Methods in Vibrations” Macmillan first