Class VII

Rock concerts have sound level of
  1. 80 dB
  2. 100 dB
  3. 120 dB
  4. 140 dB
Higher frequency, more the
  1. note of sound
  2. depth of sound
  3. depth of sound
  4. wavelength of sound
Length of air cutting is changed by
  1. valves
  2. fingers
  3. valves and fingers
  4. length
Rapid backwards and forward movements are known as
  1. Disturbance
  2. Noise
  3. Vibration
  4. Sound
Higher frequency means
  1. lower pitch
  2. higher pitch
  3. lower amplitude
  4. higher wavelength
Time Elapsed

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