A differential microphone for in-duct acoustic measurements

dc.contributor.author	C. M. E. Riley	en_US
dc.date.accessioned	2014-10-21T15:51:28Z
dc.date.available	2014-10-21T15:51:28Z
dc.date.issued	1976	en_US
dc.identifier.other	ARC/R&M-3799	en_US
dc.identifier.uri	https://reports.aerade.cranfield.ac.uk/handle/1826.2/3079
dc.description.abstract	A brief description is given of a technique using a differential microphone to measure the sound field structure within the duct of a rotor. The advantages and problems of direct in-duct, as opposed to far-field, measurement are discussed, and the present approach presented. The construction and calibration of the differential microphone are briefly described, and results from some of the experiments in which it was assessed are used to demonstrate its application.	en_US
dc.relation.ispartofseries	Aeronautical Research Council Reports & Memoranda	en_US
dc.title	A differential microphone for in-duct acoustic measurements	en_US