2013 California Standards for Accessible Design Pocket Guide
11B-407.4.8.2.2 Signal level.
The verbal annunciator shall be 10 dB minimum above ambient, but shall not exceed 80 dB, measured at the annunciator.
The verbal annunciator shall be 10 dB minimum above ambient, but shall not exceed 80 dB, measured at the annunciator.
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