According to code, how should a general evacuation signal be structured?

A general evacuation signal should be structured as a Temporal-Three signal according to the code. The Temporal-Three signaling pattern consists of three short bursts of sound followed by a pause, which is repeated to convey urgency. This specific pattern helps convey a clear and immediate alert for occupants to evacuate the building, ensuring that the signal is distinct and easily recognizable amidst other noises.

The Temporal-Three pattern benefits from the human ability to quickly interpret concentrated bursts of sound as urgent signals, prompting a swift response. This established approach is designed to minimize confusion during an emergency.

In this context, a continuous signal would lack clarity because it does not provide a discernible pattern, making it less effective in signaling evacuation. A Temporal-Two signal, which consists of two bursts, is typically used for a different context, while a non-temporal signal would not provide the necessary emphasis needed for evacuation alerts, leading to potential delays in response during critical situations.