Summarizing Hearing

Summary

  • The range of audible frequencies is 20 to 20,000 Hz.
  • Those sounds above 20,000 Hz are ultrasound, whereas those below 20 Hz are infrasound.
  • The perception of frequency is pitch.
  • The perception of intensity is loudness.
  • Loudness has units of phons.

Glossary

loudness

the perception of sound intensity

timbre

number and relative intensity of multiple sound frequencies

note

basic unit of music with specific names, combined to generate tunes

tone

number and relative intensity of multiple sound frequencies

phon

the numerical unit of loudness

ultrasound

sounds above 20,000 Hz

infrasound

sounds below 20 Hz

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