Physics, asked by mamtabalaji67, 16 days ago

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Answered by adidesle

Answer:

1.Human ear has a hearing range of 20Hz to 20KHz. Ultrasonic and Extraordinary sounds are out of this range but infrasonic sound is near to 20 Hz and can be heard by humans but with difficulty.

2.20 to 20,000

Answered by bhagat1507

Answer:

a. soft sound

b. 20 to 20,000 Hz

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