Question

What is the unit of the quantity that measures how loud or soft a sound is?

• A. ${}^{\circ }\text{C}$
• B. $\text{dB}$
• C. $\text{kg}$
• D. $\text{m}$

Answer 1

The correct option is B $\text{dB}$

Decibel ($\text{dB}$) is the unit of the quantity that expresses the loudness of a sound. Sounds emitted by birds and aeroplanes various objects would differ in terms of their loudness. For example, sounds produced by birds are not as loud as sounds produced by aeroplanes.