How to calculate sound pressure level and measure sound pressure

Sound Pressure Level Formula :

Sound Pressure Level (L_b) = 10 log₁₀ (p²p_o²)

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) = p_a2^1/2

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