Aeroacoustic Characteristics of Automotive HVAC Systems

2008-01-0406

04/14/2008

Event
SAE World Congress & Exhibition
Authors Abstract
Content
A systematic method is developed to investigate the noise generated by automotive HVAC systems. Noise measurements are performed on the front and rear HVAC systems of an automobile to illustrate the use of the developed method and to show that it is capable of identifying various noise sources and the relative importance of each source. The method entails measurements of the total sound power radiated by the HVAC system, the sound power generated by the fan alone as well as the use of a loudspeaker to replace the fan impeller and measure the transmission loss of the HVAC ducts with and without flow. It is shown that different noise sources dominate over different frequency ranges. At low frequencies, the noise generated by flow in the HVAC ducts dominates. However, in the high frequency range, f > 500 Hz, the duct flow noise and the fan noise are both important.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-01-0406
Pages
11
Citation
Madani, V., and Ziada, S., "Aeroacoustic Characteristics of Automotive HVAC Systems," SAE Technical Paper 2008-01-0406, 2008, https://doi.org/10.4271/2008-01-0406.
Additional Details
Publisher
Published
Apr 14, 2008
Product Code
2008-01-0406
Content Type
Technical Paper
Language
English