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    • 17.4: Sound Intensity
      https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/17%3A_Sound/17.04%3A_Sound_Intensity
      Intensity is the same for a sound wave as was defined for all waves, where P is the power crossing area A. The SI unit for I is watts per meter squared. Sound intensity level in units of decibels (dB)...Intensity is the same for a sound wave as was defined for all waves, where P is the power crossing area A. The SI unit for I is watts per meter squared. Sound intensity level in units of decibels (dB) is equal to the logarithm of the ratio between the intensity heard and the threshold intensity for hearing. The perception of frequency is pitch. The perception of intensity is loudness and loudness has units of phons.
    • 17.3: Sound Intensity and Sound Level
      https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/17%3A_Physics_of_Hearing/17.03%3A_Sound_Intensity_and_Sound_Level
      Intensity is defined to be the power per unit area carried by a wave. Power is the rate at which energy is transferred by the wave.
    • 16.4: Sound Intensity
      https://phys.libretexts.org/Workbench/PH_245_Textbook_V2/16%3A_Sound/16.04%3A_Sound_Intensity
      Intensity is the same for a sound wave as was defined for all waves, where P is the power crossing area A. The SI unit for I is watts per meter squared. Sound intensity level in units of decibels (dB)...Intensity is the same for a sound wave as was defined for all waves, where P is the power crossing area A. The SI unit for I is watts per meter squared. Sound intensity level in units of decibels (dB) is equal to the logarithm of the ratio between the intensity heard and the threshold intensity for hearing. The perception of frequency is pitch. The perception of intensity is loudness and loudness has units of phons.

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