Why do we need whistle in earthquake?

A whistle is an essential tool during an earthquake because it can help rescue teams locate individuals trapped under debris. Unlike shouting, which can quickly exhaust a person's voice, a whistle requires less energy and can carry further, making it easier for rescuers to pinpoint a person's location. Additionally, the sound of a whistle is distinct and can be heard over the noise of rubble and chaos, increasing the chances of a timely rescue. Having a whistle on hand can significantly enhance survival chances in emergency situations.