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What is Sound?

It is crucial to understand that when dealing with sound, two fundamental processes are occurring:

  • the physical process that produces sound energy, which travels through the air.
  • the psychological process that happens inside our ears and brains, which converts the incoming sound energy into sensations we interpret as noises, speech, and music.

Before breaking down the psychological process, i.e., our auditory system, lets first concentrate on the physical aspects of sound.

Module Topics
  • Sound Wave
  • Longitudinal Wave
  • Transverse Wave
  • Wavelength
  • Amplitude
  • Phase
  • Frequency
  • Fundamental Frequency
  • Harmonics and Overtones
  • The Harmonic Series
  • Even Order Harmonics
  • Odd Order Harmonics
  • Noise
  • Timbre
  • Transients
  • Sound Envelope (ADSR)

Course Navigation

  • What is Sound?
    • Sound Wave
    • Longitudinal Wave
    • Transverse Wave
    • Wavelength
    • Amplitude
    • Phase
    • Frequency
    • Fundamental Frequency
    • Harmonics and Overtones
    • The Harmonic Series
    • Even Order Harmonics
    • Odd Order Harmonics
    • Noise
    • Timbre
    • Transients
    • Sound Envelope (ADSR)
  • Measuring Sound
    • Decibel (dB)
    • Logarithmic Curves
    • Reference Value
    • Analog Audio Levels in dB (dBm, dBu, dBV)
    • Digital Audio Levels in dB (dBFS and dBFS RMS)
    • Sound Pressure Level (SPL)
    • Rules of Thumb for Sound Measurement
  • Hearing Sound
    • The Auditory System
    • Loudness Perception
    • Equal-Loudness Contours
    • Sound Localization
  • More Lessons Coming Soon

Return to The Fundamental Principles of Sound

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