Q2 of 34 Page 227

Mention the reason that brings the sound of fire crackers to our ears.

As a fire cracker explodes it produces a vibration in the air medium around it which is the reason we can hear a fire cracker exploding.


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4

Explain in brief about hearing impairment.

 1

Explain how does a sound making object differ from one that is silent.

 3

Mention the name of passage in the outer ear which carries sound waves to the eardrum.

 4

Sound can travel through vacuum. Is it correct?