Question

how to calculate reference sound pressure?
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Answer 1

Answer:

by hearing ok thanks you god bless you

Answer 2

Step-by-step explanation:

Sound pressure levels are also measured on a logarithmic scale but the unit is the decibel re 2 × 10−5 Fa.

14.1. 5 Sound pressure level (SPL)

SPL = sound pressure level in decibels

(re 2 ×10−5 Fa)

p = sound pressure of the noise (Pa)

Po = reference pressure (= 2 × 10−5 Pa)

20 μPa

In air, the common reference is 20 μPa, because that is near the absolute threshold for a normal human listener for a sound frequency of 1,000 Hz. This level is called sound-pressure level (SPL).