The evacuation horn must be __________ if it sounds unintentionally.

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When a false alarm occurs, the priority is to stop the audible signal so people aren’t evacuated unnecessarily. Silencing the evacuation horn immediately stops the noise and prevents panic, while keeping the system ready to be checked, reset, or reactivated after the issue is resolved. Deactivating or turning off the whole system would create more steps to restore functionality and could hinder a quick response if a real emergency arises later. Muting isn’t guaranteed to fully stop the horn on all equipment, whereas silencing directly targets stopping the sound. So silencing is the correct immediate action for an unintended evacuation horn event.