Science, asked by rakeshdangoliya, 11 hours ago

Q. 15 Sounds having frequencies lower than 20 Hz are called.

A. Ultrasonic sound

B. Infrasonic sound

C. Audible sound

D. Periodic vibrations.

Answers

Answered by tusharvashisth92

2

Answer:

option B infrasonic sound

Answered by payal2502mahato

2

Answer:

The sounds having frequency less than 20 Hz are called ultrasonics.

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