Acoustics. Determination of sound power radiated into a duct by fans and other air-moving devices. In-duct method not-for-sale including their issue and use

including their issue and use

This International Standard applies to the basic safety and essential performance of ultrasonic physiotherapy equipment as defined in 201

BS EN 62132-4 provides users with a test procedure to assess the electromagnetic immunity of integrated circuits which ensures their reliability

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5 Connection to irrigation lateral (in-line emitter)

Acoustics. Determination of sound power radiated into a duct by fans and other air-moving devices. In-duct method not-for-sale including their issue and use1 Scope 1. 1 General This International Standard specifies a method for testing ducted fans and other air moving devices to determine the sound power radiated into an anechoically terminated duct on the inlet and or outlet side of the equipment. NOTE 1 For the sake of brevity, wherever the term fan occurs in the text, it means fan or other air moving device. The method is applicable to fans which emit steady, broad band, narrow band and discrete