BUY THE YEAR 9 PHYSICS WORKBOOK

Frequency and Pitch

  • The frequency of a sound wave is related to its pitch.
  • Sound waves with higher frequencies (treble) are described as having a higher pitch.
  • Sound waves with lower frequencies (bass) are described as having a lower pitch.
  • Pitch, however, is not objective and does not have units of measurement; it is usually used to compare different sounds and can have a perceptual bias.

 
sound frequency pitch

The pitch of a sound is related to its frequency.

 

Amplitude and Loudness

  • The amplitude of a sound wave is related to its loudness.
  • Sound waves with greater amplitudes will be louder than sound waves with smaller amplitudes.
  • Similar to pitch, however, loudness is subjective and our perception of how loud a sound is depends on its frequency and the type of sound.

 
sound amplitude loudness

The loudness of a sound wave is related to its amplitude.

 

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