Class VIII

Higher frequency greater will be
  1. pitch
  2. loudness
  3. amplitude
  4. infrasound
Sound having frequencies above 20000Hz are called
  1. infrasound
  2. ultrasound
  3. mega sound
Louder sound can cause damage to
  1. hearing
  2. sight
  3. skin
  4. brain
Number of vibrations in a second is called
  1. pitch
  2. frequency
  3. amplitude
  4. infrasound
If we tighten strings of instrument pitch will be
  1. higher
  2. lower
  3. constant
  4. no pitch
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