Title :
Experimental research on the sound source data of the duct system
Author :
Feng, Tao ; Wang, Jing ; Liu, Bin ; Li, Nan ; Wu, Xue
Author_Institution :
Sch. of Mater. & Mech. Eng., Beijing Technol. & Bus. Univ., Beijing, China
Abstract :
The source Data of a duct system is studied in theoretical, experimental and numerical ways respectively. The physical meaning of the source data is obtained through theoretical derivation. The experimental model of two-port acoustic source is established, and the source data have been measured by the method "with an external source". The physical insight of source parameter has been demonstrated through the experimental method. The experimental results have shown that the differences between the source data and acoustic pressures at specific locations inside the duct will decrease gradually as the acoustic boundary condition at the duct openings approximates the ideal boundary condition of total absorption more and more. The larger the sound absorption coefficient is, the smaller the difference is, and more the acoustic propagating mode approximates the traveling wave.
Keywords :
acoustic generators; acoustic radiators; acoustic wave absorption; acoustic wave propagation; ducts; structural acoustics; acoustic boundary condition; acoustic pressures; acoustic propagating mode; duct openings; duct system; external source; ideal boundary condition; sound absorption coefficient; sound source data; source parameter; total absorption; traveling wave; two-port acoustic source; Absorption; Acoustic measurements; Acoustics; Atmospheric measurements; Particle measurements; duct system; experimental research; source parameter; two-port model;
Conference_Titel :
Communication Software and Networks (ICCSN), 2011 IEEE 3rd International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-485-5
DOI :
10.1109/ICCSN.2011.6014370
