Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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The Ontario Building Code | Sound Patterns of Smoke Alarms

9.10.19.2. Sound Patterns of Smoke Alarms

(1) The sound patterns of smoke alarmsshall,

(a) meet the temporal patterns of alarm signals, or

(b) be a combination of temporal pattern and voice relay.

In Plain Language

Smoke alarms must produce the sound pattern set out in this article, a standardized alert tone recognized specifically as a fire warning.

This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.