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2.5火灾警报装置该工程未使用消防广播,仅使用火灾警报装置。警报装置分为两种:一种是音量输出很大的电动警笛(报警器),1 m处输出声压级达110~123 d B(A);另一种是音量输出较小的声响器(电喇叭),1 m处输出声压级为90 d B(A)。车间内生产区域的本底噪声较大,故使用电动警笛。车间内的辅助设施,如办公室、休息室、配变电所、卫生间等场所的本底噪声较小,故使用声响器。注:d B(A)中的(A)指的是频率加权特性为A,以下用d B简化表示。根据笔者在国内某汽车厂的实测数据,涂装车间某些区域的噪声均值已达85 d B。对于这些场所,使用消防广播系统,会对扬声器的灵敏度、输出功率、间距提出较为苛刻的要求。国内使用较多
2.5 Fire Alarm Device This project does not use fire broadcasting, only use the fire alarm device. Alarm device is divided into two types: one is a large volume electric siren (alarm), 1 m at the output sound pressure level of 110 ~ 123 d B (A); the other is the volume output smaller sounder (Electric horn), the output sound pressure level at 1 m is 90 d B (A). The noise floor of the production area in the workshop is larger, so the use of electric siren. Workshop auxiliary facilities, such as offices, lounges, distribution substations, toilets and other places less noise floor, so the use of sounders. Note: (A) in d B (A) means that the frequency weighting property is A, and the following is abbreviated as d B. According to the author in a domestic automobile factory measured data, coating workshop in some areas of the average noise has reached 85d B. For these locations, the use of fire broadcasting system, the speaker’s sensitivity, output power, spacing made more demanding requirements. Domestic use more