Title of article :
Characterization of air terminal device noise using acoustic 1-port source models
Rنmmal، نويسنده , , H. and Abom، نويسنده , , M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
A measurement method to characterize a standard air terminal device as an acoustic 1-port source has been tested and validated. The low-frequency noise generated by flow separation in the device and radiated to a reverberation room has been measured, together with pressure auto- and cross-spectra inside the connected duct. A 1-port source model with parameters derived from the in-duct data was then created. For the source strength part a scaling law was derived showing dipole dependence for the flow speed exponent. To validate the 1-port model and to prove its ability to predict flow noise generation, measurements were performed on a modified duct system.
Journal title :
Journal of Sound and Vibration