# Sound Wave Equations Formulas Calculator

## Science Physics

Solving For Sound Wave Pressure

#### Inputs:

 reference or hearing threshold pressure (Pref) pascal atmosphere bar dyne/centimeter^2 foot of water inch of mercury inch of water kilonewton/meter^2 millibar millimeter of mercury newton/meter^2 pound/foot^2 pound/inch^2 torr sound pressure level (SPL) decibel

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#### Conversions:

 reference or hearing threshold pressure (Pref) = 0 = 0 newton/meter^2 sound pressure level (SPL) = 0 = 0 decibel

#### Solution:

 sound wave pressure (P) = HAS NOT BEEN CALCULATED

#### Other Units:

Change Equation
Select an equation to solve for a different unknown

 sound pressure level sound pressure reference pressure sound intensity level sound intensity reference intensity intensity at a distance from point source distance from sound source power emitted wave frequency wave velocity wavelength noise pollution level NPL

Where
 SPL = sound pressure level, decibels (db) P = sound wave pressure, newtons/meter2 Pref = reference pressure or hearing threshold, newton/meter2 IL = intensity level, decibel (db) I = sound intensity, watt I0 = reference intensity or least audible sound level, watts PAV = average power, watt NPL = noise pollution level, decibel (db)

Notes:
- Usually, I0 is set to 10-12 watts
- Usually, Pref is set to 0.00002 newtons/meter2
References - Books:

1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.
2) Tipler, Paul A.. 1995. Physics For Scientists and Engineers. Worth Publishers. 3rd ed.

by Jimmy Raymond