That is commonly measured in decibels.
there are many unit which measure volume .SI units that measure volume is cubic meter .
Take a sound pressure level meter (SPL meter). Try to measure the sound pressure p in pascals or in decibels.
If you mean what unit is used to measure volume then its litres, mililitres, kilolitres, etc...
Any metric measure of volume.
They are used to measure quantities that are not basic. Length, for example, is a basic unit, but area and volume are not so derived units will be used to measure area and volume.
A decibel.
The SI unit for volume is the cubic meter
decibels measure the intensity of sound.
The SI unit for volume is the cubic meter
Decibels
mililiters
milliliters, liters, kiloliters