摘要
针对现有规范和图集关于消防广播传输线允许最大距离计算存在错误和不妥的现状,根据据线路电压降和线路衰减推导了其计算公式,计算了不同功率时衰减不大于0.5 dB和3 dB的允许最大距离选择表。
In view of the errors and improprieties of the allowable maximum distance calculation of the fire broadcasting transmission line in the existing codes and atlas,the calculation formula is derived according to the line voltage drop and line attenuation.Based on it,the allowable maximum distance selection table with attenuation no more than 0.5 dB and 3 dB at different power is calculated.
作者
倪高俊
郑凯
NI Gaojun;ZHENG Kai(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310000,China)
出处
《现代建筑电气》
2021年第3期69-72,共4页
Modern Architecture Electric
关键词
消防广播
传输线路
传输距离
额定传输电压
声衰减
fire broadcasting
transmission line
transmission distance
rated transmission voltage
sound attenuation
