65dB(A) @ 500Hz - 2000Hz
+5dB(A) @ 500Hz - 2000Hz
Bac
kgr
ound Noise
75dB(A)
Fire alarm sound level should be in
500 Hz-2000 Hz
frequency range and
at least 65 db(A)
or 5 dB(A)
more than medium noise which may present for longer than 30 sec. Fire alarm
sound level should
not exceed 120 dB(A)
for places where people are present.
Minimum alarm sound levels can be heard from the all needed places. Alarm devices
should be enough quantities in order to provide suggested alarm sound level.
To wake sleeping people up, �ire alarm sound level should be at least
75 dB(A)
at the edge
of the bed.
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