This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Digital Acoustic Intensity Techniques in Gasoline Engine Noise Studies
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes the use of digital measurements to assess acoustic intensity close to the various surfaces of a two litre gasoline engine. Using phase-locked data acquisition an acoustic power balance is constructed for the engine which is shown to correlate well with three other methods - lead covering, average surface vibration level and close microphone. However, the prediction of sound pressure level from these power balances is shown to be difficult, at least at 1 m from the surface. A simple relationship between acoustic intensity and sound pressure level in the frequency domain has been found.
Authors
Citation
Abe, T. and Anderton, D., "Digital Acoustic Intensity Techniques in Gasoline Engine Noise Studies," SAE Technical Paper 820363, 1982, https://doi.org/10.4271/820363.Also In
References
- Sweeney E.M. “Measuring sound power of earthmoving machinery using acoustic intensity” International Congress on Recent Developments in Acoustic Intensity Measurement Senlis, France October 1981
- Chung J.Y. et al “Application of acoustic intensity measurement to engine noise evaluation” SAE Paper, Detroit, 790502
- Fahy F.J. “Measurement of acoustic intensity using the cross-spectral density of two microphone signals” J. Acoust. Soc. Am. 62 1613 1616 1977
- Chung J.Y. “Cross-spectral method of measuring acoustic intensity without error caused by phase mismatch” J. Acoust. Soc. Am. 64 1613 1616 1978
- Anderton D. Halliwell N.A. “Noise from vibration” Paper 800407 presented at SAE Diesel Engine Noise Conference Detroit 1980
- Beranek L.L. “Noise and Vibration Control” McGraw-Hill 1971