Q. Sound of frequency below 20 Hz is called

  • (A) audio sounds
  • (B) infrasonic
  • (C) ultrasonic
  • (D) supersonics
✅ Correct Answer: (B) infrasonic

Published by Pradeep Sikarwar ⭐ 9.01K Points at 02-Aug-2021 08:47 pm in Physics

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