Active sound quality control of engine induced cavity noise

Active control solutions appear to be a feasible approach to cope with the steadily increasing requirements for noise reduction in the transportation industry. Active controllers tend to be designed with a target on the sound pressure level reduction. However, the perceived control efficiency for th...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2009-02, Vol.23 (2), p.476-488
Main Authors: de Oliveira, Leopoldo P.R., Janssens, Karl, Gajdatsy, Peter, Van der Auweraer, Herman, Varoto, Paulo S., Sas, Paul, Desmet, Wim
Format: Article
Language:English
Subjects:
Acoustics
Active control
Engine noise
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Noise: its effects and control
Physics
Sound quality
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Summary:Active control solutions appear to be a feasible approach to cope with the steadily increasing requirements for noise reduction in the transportation industry. Active controllers tend to be designed with a target on the sound pressure level reduction. However, the perceived control efficiency for the occupants can be more accurately assessed if psychoacoustic metrics can be taken into account. Therefore, this paper aims to evaluate, numerically and experimentally, the effect of a feedback controller on the sound quality of a vehicle mockup excited with engine noise. The proposed simulation scheme is described and experimentally validated. The engine excitation is provided by a sound quality equivalent engine simulator, running on a real-time platform that delivers harmonic excitation in function of the driving condition. The controller performance is evaluated in terms of specific loudness and roughness. It is shown that the use of a quite simple control strategy, such as a velocity feedback, can result in satisfactory loudness reduction with slightly spread roughness, improving the overall perception of the engine sound.
ISSN:0888-3270
1096-1216
DOI:10.1016/j.ymssp.2008.04.005