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ADAAG Manual

Note: This document, portion of document or referenced document was published prior to the 2010 ADA Standards, and all or part of this information may only apply to Safe Harbored elements.

Audible Alarms [4.28.2]

Sound levels are specified in this section to benefit people who have a hearing impairment. The sound of the alarm must be able to be distinguished above and apart from the prevailing sound level within the space. Recommendation: Alarms with a periodic element to the signal, such as single stroke bells, hi-low, and fast whoop, are considered more effective than those with continuous or reverberating tones. Consider a signal with a sound characterized by three or four pure tones without much "noise" in between.

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