Decibels are the scale used for measuring the volume of sounds.
Volume is measured in cubic units
the unit is m3 (cubic metre)
litres would do.
Liters & milliliters
Millilitre or litre
The unit for measuring the volume of sound is the decibel.
A beaker is a container which can also be used as a measuring device for volume. It is not a unit of measurement.
A-best cubeB-measuring cubeC-unit cubeD-volume cubeThe answer is c- unit cube