# SPL (Sound Pressure Lvl) Calculator

This online step by step sound SPL calculator will help you to find the sound pressure level(SPL) or noise pollution.

## How to calculate sound pressure level and measure sound pressure

__Sound Pressure Level Formula__ :

Sound Pressure Level (L_{b}) = 10 log_{10} (^{2}_{o}^{2}

Where,

L_{b} is sound pressure level in (dB)

p is sound pressure in (Pa)

p_{o} is reference sound pressure in (Pa)

__Measuring Sound Pressure Formula__ :

measured (effective) pressure (P_{e}) = _{a}^{1/2}

Where,

P_{a} is maximum pressure amplitude in the sound wave (P_{a})

P_{e} is measured (effective) pressure (P_{a})

## Typical Subjective Description of Sound Pressure Level

0 to 40 dB is quiet to very quiet

60 to 80 dB is noisy

100 dB is very noisy

Greater than 120 dB is intolerable