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Class 8 Science Learning Guide: Certification Test 405

Pitch and Loudness Notes App & e-Book: MCQ 405

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MCQ: 405

Sounds which are below 20Hz frequencies are called

  1. infrasound
  2. ultrasound
  3. mega sound
  4. micro sound

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Pitch and Loudness Learning Guide: Class 8 Science App & eBook Notes

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