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CBSE Class 9 Science Question 11 of 33

Sound — Question 11

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Question

Question 11

Give two practical applications of the reflection of sound waves.

Answer

Two practical applications of the reflection of sound waves are:

  1. Stethoscope — It is a medical device used to hear sounds within the body mainly heartbeat. In stethoscopes the sound of the patient's heartbeat reaches the doctor's ears by multiple reflection of sound.
  2. Curved ceilings of concert halls — Generally the ceilings of concert halls, conference halls and cinema halls are curved so that sound after reflection reaches all corners of the hall.