279: Fire Alarm Sounder Tones, Pulse Patterns and Frequencies

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Standard (Norm)	Tone	Frequency (Hz)	Pulse pattern	Note
BS 5839 Part 1 (1988)	Continuous	970	On	Evacuation
SS 03 17 11, No. 4	Continuous	500	On	Swedish Standard, All clear
BS 5839 Part 1 (1988)	Intermittent	950	1s(On)-1s(Off)	Alert
ISO 8201	Intermittent	970	0.5s(On)-0.5s(Off)- 0.5s(On)-0.5s(Off)- 0.5s(On)- 1.5s(Off)	US Temporal Tone LF
	Intermittent	520	0.5s(On)-0.5s(Off)- 0.5s(On)-0.5s(Off)- 0.5s(On)- 1.5s(Off)	US Temporal for sleeping accommodation
AS 2220 (1978)	Intermittent	420	0.6s(On)-0.65s(Off)	Australia, Alert
SS 03 17 11, No. 6	Intermittent	500	0.15s(On)-0.6(Off)	Swedish Standard, Local Warning
SS 03 17 11, No. 1	Pulse tone	500	0.15s(On)-0.1(Off)	Swedish Standard, Imminent Danger
NF S 32-001 (1975)	Alternating	560-440	0.1s(On)-0.4s(Off)	France, fire sound
BS Firetone	Sweep-up	800-970	0.14s
	Sweep-up	800-970	1s	Italy, Alert
DE industrial alarm	Sweep-up, Continuous, Slow-whoop	150-1000-150	10s-40s-10s	Germany
NEN2575	Slow-whoop Sweep-up, linear	500-1200	3.5s-0.5s	Netherlands
AS 2220 (1978)	Slow-whoop Sweep-up, linear	500-1200	3.75s-0.25s	Australia, Action
DIN33404 Part 3	Sweep-down	1200-500	1s	DIN-Tone
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