Question

What is the pressure ratio for a sound that is 90 dB SPL?

Answer 1

To calculate the pressure ratio for a sound for measuring sound, we use the following logarithmic formula of Sound Pressure Level (SPL):

SPL =
`20\log_(10)(p)/(p_(ref)) dB`

where,

p = pressure to be measured

`p_(ref)` = reference pressure

`(90)/(20)` =
`\log_(10)(p)/(p_(ref)) dB`

`10^(4.5)` =
`(p)/(p_(ref))`

pressure ratio is :

`(p)/(p_(ref))` =
`3.16* 10^(5)`