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Identification of dominant noise sources in a diesel power group

Abstract : This paper aims to investigate and determine the primary causes of noise in a diesel engine group using airborne acoustic measurements. The presented work is useful in defining and enhancing the equivalent sound level and sound pressure level (SPL) at a specific octave band. The work first describes the theoretical origins of sound and the benefits of the time-frequency domain for the analysis of airborne acoustic signals. Then, an experimental approach was established to identify the primary sources and the contribution of dominant sources in the total radiated noise upon examination of the measured data. Results showed that engine exhaust noise is the main contributor of noise, especially in the low and mid frequency ranges due to different harmonic exciter orders.
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Submitted on : Friday, August 14, 2020 - 11:08:28 AM
Last modification on : Tuesday, December 8, 2020 - 10:20:41 AM
Long-term archiving on: : Monday, November 30, 2020 - 7:39:23 PM

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Hasan Hassoun, Jaafar Hallal, Mohammad Hammoud, Denis Duhamel. Identification of dominant noise sources in a diesel power group. 23rd International Congress on Acoustics, Sep 2019, Aachen, Germany. ⟨hal-02915347⟩

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