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The Prediction Technique of Sound and Vibration by the Measurement of Near-Field Particle Velocity
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English
Abstract
More advanced technique than Acoustic Intensity Method with two microphones was developed. The characteristics of this method is to measure the amplitude and phase distribution of particle velocity at the near-field of an object using three microphones.
By signal processing based on these information, the vibration modes of noise sources and the far-field sound radiation patterns can be obtained simultaneously, which brings the remarkable improvement of research efficiency.
This method was applied first to the speaker model to confirm the accuracy and usefully to the actual transmission of a truck.
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Citation
Takatsuki, K., Inoh, T., Senda, T., and Umezawa, K., "The Prediction Technique of Sound and Vibration by the Measurement of Near-Field Particle Velocity," SAE Technical Paper 861283, 1986, https://doi.org/10.4271/861283.Also In
References
- Chung J.Y. Blaser D.A. “Recent Developments in the Measurement of Acoustic Intensity using the Cross-Spectral Method” SAE Paper No. 810396 1981
- Umezawa K. Houjou H. Kitano T. “Estimation of plate vibration and its far field sound by means of near field sound measurement” Bulletin of the JSME 29 252 June 1986
- Ochiai K. Aisaka M. Sakata S. “Simple Model Technique for Better Understanding of Diesel Engine Vibration and Noise” SAE Paper No. 750834 1976