Sound Pressure Level Calculator

Enter the sound pressure and reference pressure into the calculator to determine the sound pressure level, also known as dB level.

Sound Pressure Level Formula

The following equation is used to calculate a sound pressure level.

dB = 10 * log ( p^2 / pr^2)

  • Where dB is the sound pressure in decibels
  • P is the sound pressure (pascals)
  • pr is the reference pressure (pascals)


What is a sound pressure level?

A sound pressure level is a pressure wave caused by a differential in pressure produces by sound waves.

sound pressure level calculator

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