Characterization of air terminal device noise using acoustic 1-port source models
2007 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 300, no 05-mar, 727-743 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2007. Vol. 300, no 05-mar, 727-743 p.
sound, flow, ducts
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-16327DOI: 10.1016/j.jsv.2006.08.035ISI: 000243561200017ScopusID: 2-s2.0-33845886958OAI: oai:DiVA.org:kth-16327DiVA: diva2:334369
QC 201005252010-08-052010-08-052011-01-14Bibliographically approved