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เสียงสะท้อนเกิดขึ้นได้อย่างไร

กระจกจะไหลภาพและส่งแสงกลับ ผนังยังส่งเสียงกลับ หากคุณยืนห่างไกลจากกำแพงสูงหรือหน้าผาขนาดใหญ่คุณจะได้ยินเสียงของคุณหมุนกลับไม่กี่วินาทีในภายหลัง

หากคลื่นเสียงพบผนังหรือพื้นผิวหินที่สูงและกว้างจะหมุนย้อนกลับไปยังแหล่งที่มา นั่นคือวิธีที่เสียงสะท้อนเกิดขึ้น หากเสียงที่ดึงออกมาสั้นและคลื่นเสียงเข้าถึงแบตเตอรี่ตามปกติเสียงสะท้อนจะได้ยินอย่างชัดเจน ร่องรอยของเสียงยังคงอยู่ในหูเป็นเวลา1/10 วินาที

เนื่องจากความเร็วของเสียงในอากาศ๓๔๐เมตรต่อวินาทีระยะห่างระหว่างแหล่งกำเนิดเสียงและแบตเตอรี่จะต้องมีอย่างน้อย17เมตร

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