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Class 8 Science MCQs – Certification Test 405

Pitch and Loudness Trivia (Question 405) – App & e-Book Download

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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 Trivia App & e-Book – Class 8 Science Learning Guide

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