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http://dx.doi.org/10.5050/KSNVE.2010.20.11.1089

Identification of Noise Source of the HVAC Using Complex Acoustic Intensity Method  

Yang, Jeong-Jik (자동차부품연구원 기업지원신뢰성본부)
Lee, Dong-Ju (충남대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.20, no.11, 2010 , pp. 1089-1096 More about this Journal
Abstract
The relation between the vibration induced from machinery and the radiated sound is complicated. Acoustic intensity method is widely used to obtain the accuracy of noise measurement and noise identification. In this study, as groundwork, the complex acoustic intensity method is performed to identify noise source and transmission path on different free space point source fields. As an industrial application, the complex acoustic intensity method is applied to HVAC to identify sound radiation characteristics in the near field. Experimental complex acoustic intensity method was applied to HVAC, it is possible to identify noise sources in complicated sound field characteristics which noise sources are related with each other, and certificate the validity of complex acoustic intensity. Especially, it can be seen that complex acoustic intensity method using both of active and reactive intensity is vital in devising a strategy for identification of noise. Also, the vector flow of acoustic intensity was investigated to identify sound intensity distributions and energy flow in the near field of HVAC.
Keywords
HVAC; Complex Acoustic Intensity Method; Source Identification; Active Intensity; Reactive Intensity; Cross Spectrum; Vector Flow;
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