Question

Why is echo not heard in a small room? Give practical applications of

reflection of sound waves.​

Answer 1

Answer:

Reflection of sound is used to measure the distance and speed of underwater objects. This method is known as SONAR. Working of a stethoscope is also based on reflection of sound. In a stethoscope, the sound of the patient's heartbeat reaches the doctor's ear by multiple reflections of sound.

Echo:-The phenomenon of reflection of sound from a surface is called echo. They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.

Explanation:

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Answer 2

Answer:

answer

Explanation:

Echo:-The phenomenon of reflection of sound from a surface is called echo. They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.