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ASTTBC RFPT — Fire Alarm Systems (AL) · Question

Under NBCC 3.2.4.19, what is the minimum sound pressure level required for fire alarm signals in a sleeping room (measured at the pillow)?

NBCC 3.2.4.19.2 states the signal shall be at least 10 dBA above ambient, but never less than 65 dBA. Use of 500 Hz or temporal pattern is also detailed.

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Question: Under NBCC 3.2.4.19, what is the minimum sound pressure level required for fire alarm signals in a sleeping room (measured at the pillow)?

Answer options:

  • 55 dBA
  • 60 dBA
  • 75 dBA ✅ 65 dBA

Correct answer: 65 dBA

Explanation: NBCC 3.2.4.19.2 states the signal shall be at least 10 dBA above ambient, but never less than 65 dBA. Use of 500 Hz or temporal pattern is also detailed.

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