In-duct, free-field and reverberant field test methods from which sound output of fan may be derived; semi-reverberant test method and methods for site testing. Definitions, symbols, formulae. Procedure and instruments for measuring fan sound output. Illustrations of modification to test airway (in BS 848:Part 1) for sound measurement.
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Methods of testing fans.-Fan noise testing
BSI Group , 11/30/1966
Pages: 56
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