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A New Method of Powertrain Noise Source Identification using a Particle Velocity Probe for Acoustic Intensity Measurement
Technical Paper
2009-01-2173
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes the use of a new probe for direct measurement of particle velocity for an acoustic intensity survey of a test engine at Ricardo UK.
The new probe includes both a pressure and a particle velocity transducer in a single package [2], utilising the miniature hot wire principle. This probe enables near-field direct measurement of the acoustic intensity on a test powertrain, and is referred to here as the ‘P-U’ (Pressure- Velocity) Probe.
The new technique has significant advantages over the traditional pressure differential acoustic intensity technique that include a wider frequency bandwidth, better rejection of the reverberant sound field and the ability to easily and safely take measurements over a wider range of engine operating conditions.
The use of the method for noise source identification is described and the test results are shown to compare well with those obtained from the traditional pressure differential acoustic intensity technique.
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Authors
Citation
Brown, A., Kauth, M., Strong, G., and Gregory, S., "A New Method of Powertrain Noise Source Identification using a Particle Velocity Probe for Acoustic Intensity Measurement," SAE Technical Paper 2009-01-2173, 2009, https://doi.org/10.4271/2009-01-2173.Also In
References
- Noise Source Location Techniques - Simple to Advanced Applications Brüel & Kjær Sound and Vibration March 2003 Batel Mehdi Marroquin Marc Hald Jørgen Christensen Jacob J. Schuhmacher Andreas P. Nielsen Torben G.
- The Microflown E-book de Bree Hans-Elias
- LMS Signal Processing Functions Software Documentation
- A Note on the Calibration of Pressure Velocity Sound Intensity Probes J. Acoust. Soc. Am. 120 2 August 2006 Jacobsen Finn Jaud Virginie