Possibly in EN 54 Series.
Part 3: Fire alarm devices — Sounders
See BS 5839 Series. BS 5839-1 or -8.
code 21.1b recommends 5dB. 10dB in noise environments (see 22.1.10).
Chuck McDowell
Compliance Specialist
Meyer Sound Laboratories Inc.
Direct: 510-540-4670
From: Doug Powell
Vehicular audio waring is covered in UN regulation #28 and NHTSA (DOT) 812-209.
Fire alarm stuff can be found in UL1480 and CAN S525; and other stuff in
UL464A, UL1971, CAN S526; but have no direct experience with application of
these particular standards.
Brian
From: Doug Powell
All,
I recall some time ago reading information on minimum sound pressure level
for acoustic warning in noisy environments. It was possibly in an IEC
standard or a handbook making recommendations. As I recall the
recommendation was something like warning bells, horns and klaxons should
be 3 to
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