Answer-Decibel is the unit used for –

The decibel abbreviated dB is the unit used to measure the intensity of a sound. The decibel scale is a little odd because the human ear is incredibly sensitive. Our ears can hear everything from your fingertip.brushing lightly over your skin to a loud jet engine. The decibel dB is a logarithmic unit that indicates the ratio of a physical quantity usually power or intensity relative to a specified or implied reference level.