標準號：ISO 13347-4-2004
中文標準名稱：工業風扇.標準化實驗室條件下風扇聲功率級的測定.第4部分:聲強法
英文標準名稱：Industrial fans - Determination of fan sound power levels under standardized laboratory conditions - Part 4: Sound intensity method
標準類型：J72
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J72
國際標準分類號：17.140.20;23.120
適用范圍：This part of ISO 13347 applies to industrial fans as defined in ISO 5801 and ISO 13349. It is limited to the determination of airborne sound emission for the specified set-ups. Vibration is not measured, nor is the sensitivity of airborne sound emission to vibration effects determined. The sizes of the fan, which can be tested in accordance with this part of ISO 13347, are limited only by the practical aspects of the test installations. This part of ISO 13347 determines sound power by using sound intensity measurements on a measurement surface which encloses the sound source. It provides guidelines on the acoustical environment, ambient noise, measurement surface, and number of measurements. The test set-ups are generally designed to represent the physical orientation of a fan installed in accordance with ISO 5801 and also used in ISO 13347-2.