เสียงที่ใช้ร่วมกัน

This mammal… can see in total darkness. Not with eyes. But with sound. It’s the bat. And it doesn’t need light to navigate. It emits high-frequency sounds… far beyond human hearing. These sound waves bounce off objects… and return as echoes. Building a detailed map of its surroundings. Distance. Shape. Movement. Even tiny insects in mid-air. All detected instantly. So while the world goes dark… the bat keeps flying. Hunting. Dodging. Surviving. Because for this animal… dark