Panel acoustic contribution analysis.
Formulations are derived to analyze the relative panel acoustic contributions of a vibrating structure. The essence of this analysis is to correlate the acoustic power flow from each panel to the radiated acoustic pressure at any field point. The acoustic power is obtained by integrating the normal component of the surface acoustic intensity, which is the product of the surface acoustic pressure and normal surface velocity reconstructed by using the Helmholtz equation least squares based nearfield acoustical holography, over each panel. The significance of this methodology is that it enables one to analyze and rank relative acoustic contributions of individual panels of a complex vibrating structure to acoustic radiation anywhere in the field based on a single set of the acoustic pressures measured in the near field. Moreover, this approach is valid for both interior and exterior regions. Examples of using this method to analyze and rank the relative acoustic contributions of a scaled vehicle cabin are demonstrated.
Department of Mechanical Engineering, Wayne State University, Detroit, Michigan 48202, USA. sean_wu@wayne.edu
Sean F
SF
Wu
Logesh Kumar
LK
Natarajan
D000162:Acoustics / Q000295:instrumentation; D004867:Equipment Design; D006696:Holography; D016018:Least-Squares Analysis; D008962:Models, Theoretical; D009038:Motion; D011312:Pressure; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure; D014732:Vibration