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2. ISO 3822. Acoustics – laboratory tests on noise emission from appliances and equipment used in water supply installations; 1999.
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4. Structure-borne sound excitation due to flow (in German);Heckl;Proc DAGA,1970
5. Simplified test method to characterize the structure-borne sound emission of water appliances (in German);Fischer;Bericht des Fraunhofer-Instituts für Bauphysik, B-BA,1991