Class VIII

Tiny hairs are moved due to vibrations in fluid in
  1. pinna
  2. ear drum
  3. hammer
  4. cochlea
Loudness is measured in units called
  1. Hertz
  2. decibels
  3. Pascal
  4. ampere
Vibrations in stirrup are greater than ear drum due to arrangement in
  1. lever like manner
  2. ascending manner
  3. descending manner
  4. jointed manner
Wavelength of high frequency sound wave is
  1. longer
  2. shorter
  3. same
  4. constant
Higher frequency greater will be
  1. pitch
  2. loudness
  3. amplitude
  4. infrasound
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