An improved sampling tube for in-duct fan sound measurement

Davy, J, Baade, P and Halvarsson, J 2003, 'An improved sampling tube for in-duct fan sound measurement', in J. Tourret, A. Guedel (ed.) Fan Noise 2003, Senlis, France, 23-25 September 2003.

Document type: Conference Paper
Collection: Conference Papers

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Title An improved sampling tube for in-duct fan sound measurement
Author(s) Davy, J
Baade, P
Halvarsson, J
Year 2003
Conference name Second International Symposium on Fan Noise
Conference location Senlis, France
Conference dates 23-25 September 2003
Proceedings title Fan Noise 2003
Editor(s) J. Tourret, A. Guedel
Publisher CETIM
Place of publication Senlis, France
Abstract A number of researchers have shown that the currently available commercial sampling tube (microphone turbulence screen) suffers from excessive self-noise, poor turbulence rejection and non-smooth frequency response. This paper describes the development of an improved sampling tube by Baade. In particular, it discusses the difficulties encountered by Halvarsson and Davy when measuring the pure tone frequency response of sampling tubes in an anechoic room. This research is still in progress, but results to date are presented. It is planned that the design resulting from this research will be included in ASHRAE Standard 68 and ISO 5136.
Subjects Acoustics and Acoustical Devices; Waves
Copyright notice © 2003 CETIM
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