BS 4718(1971) : 1971被替代
METHODS OF TEST FOR SILENCERS FOR AIR DISTRIBUTION SYSTEMS
出版：British Standards Institution
专家解读视频
基本信息
标准编号： BS 4718(1971) : 1971
发布时间：1971/1/1 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：30
标准简介
Describes the measurement and performance of silencers and silencing elements for ducted ventilating and air conditioning systems. It considers three aspects, the attenuation of broad band airborne sound, the generation of aerodynamic noise by air flowing through the silencer and the change in pressure or air flowing through the silencer. Not to be used to determine the performance of silencers providing selective attenuation over narrow frequency bands or to silencers which are designed for direct coupling to a fan, or to silencers designed to be installed to increase the sound insulation of a partition having a ventilation opening.
替代本标准的新标准
