ANSI/UL 2572-2011 大众通报系统的通信和控制单元的标准

标准号：ANSI/UL 2572-2011
中文标准名称：大众通报系统的通信和控制单元的标准
英文标准名称：Standard for Communication and Control Units for Mass Notification Systems
标准类型：A91
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：A91
国际标准分类号：13.200
适用范围：Due to the inherent construction of speakers, they can not be dust tight. This proposed standard change pertains to the outdoor speaker only, not the outdoor control equipment. During the July 2011 STP meeting many members mentioned that a sand/dust spray will ingress into any speaker at the location where the sound comes out, and the important issue is that the HPSA is still loud and intelligible after the sand/dust test.