519 - Passive noise control design used on automotive HVAC system to reduce tonal noise
Wang P.
Abstract
Nowadays, the engine and blower fan design has advanced so much, which most engine intake and flow noise in the duct has significantly contributed to the overall noise level. Especially in automotive HVAC system, quieter engine and tighter space asks for sophisticated flow duct and blower fan design. You can expect to get bad tonal effects or resonance, when the operating blower speed coincides with the duct acoustic modes. In this paper, we will discuss the theoretical background of an innovative way to design-in a low cost noise reduction system, which will use the acoustic power from fan and reduce system response at duct resonances. The experimental results of a PVC pipe with a regular blower motor fan will be presented along with the simulation ran on MATLAB.
Citation
Wang P.: Passive noise control design used on automotive HVAC system to reduce tonal noise, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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