Title: A parametric study of location effects on the sidebands of Helmholtz resonators using boundary element analysis
Abstract:An important noise source used to tune automotive interior sound levels and quality is the sound which radiates from the open end of the engine induction system—induction noise. Understanding this sou...An important noise source used to tune automotive interior sound levels and quality is the sound which radiates from the open end of the engine induction system—induction noise. Understanding this source and its tuning can be vital to produce the customer-desired sound inside the vehicle. The most traditional method to attenuate (or tune) induction noise is through the addition of passive devices, the most common of which is the Helmholtz resonator. An unfortunate side effect to such a device is that narrow bands of frequencies higher and lower than the bandwidth of the resonator, called sidebands, tend to be amplified by the device. The subject of this study is to qualify the effect of changing resonator location on these sidebands. This is studied by determining the system frequency response to a white noise input by performing boundary element analysis on a simplified air induction system. The location of the device is varied, and the magnitude and frequency shift of the sidebands are studied. Experimental validation is also provided for select models.Read More
Publication Year: 2002
Publication Date: 2002-05-01
Language: en
Type: article
Indexed In: ['crossref']
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