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A Study of the Vehicle Acoustic Control for Booming Noise Utilizing the Vibration Characteristics of Trunk Lid
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English
Abstract
An acoustic control technique for reducing booming noise caused by road surface roughness is described. This noise, mainly in the frequency range between 25 and 40Hz and accompanied by a pressure sensation, is closely related to suspension vibration characteristics and the acoustic response of the vehicle compartment. A reduction method which separates the highest acoustic response from suspension resonance in this frequency region is proposed.
An acoustic simulation model is used to estimate the effects of the luggage compartment on this noise and of trunk lid vibration characteristics in optimizing acoustic properties of the compartment. As a result, a frequency region for trunk lid resonance which lowers booming noise is obtained. Estimated booming noise reduction is experimentally confirmed in road tests.
A study of human auditory characteristics is also conducted to ascertain the frequency range and booming noise level which produce uncomfortable sensations.
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Citation
Osawa, T. and Iwama, A., "A Study of the Vehicle Acoustic Control for Booming Noise Utilizing the Vibration Characteristics of Trunk Lid," SAE Technical Paper 861410, 1986, https://doi.org/10.4271/861410.Also In
References
- Nefske D.J. Wolf, J.A. Jr. Howell L.J. “Structural Acoustic Finite Element Analysis of the Automobile Passenger Compartment: A Review of Current Practice” Journal of Sound and Vibration 80 2 1982
- Nefske D.J. Sung S.H. Duncan A.E. “Application of Finite Element Methods to Vehicle Interior Acoustic Design” SAE Paper 840743 1984
- Morimura M. Kanai S. “An Investigation of Body Structure Acoustic Characteristics for the Purpose of Reducing the Booming Noise” FISITA 82050 1982
- Flanigan D.L. Borders S.G. “Application of Acoustic Modeling Methods for Vehicle Boom Analysis” SAE Paper 840744 1984