Question

Why is sound measured in $dB$?

Answer 1

Decibels: It is a scale used to measure the intensity of the sound

1. It is a logarithmic scale, the additions in this scale don't actually add the multiples.
2. Decibel is a relative measure of intensity
3. This relates the intensity of the sound wave to pressure.
4. This scale is used for an easy convention of sound intensity.

Hence, the sound is measured in decibels (dB).