Question

Noise pollution is measured in

• A. Hertz
• B. Fathoms
• C. Nanometres
• D. Decibels

Answer 1

The correct option is D Decibels

Noise pollution is caused by the incresed levels of sound. It is measured in decibels (dB)

A. Hertz is the SI unit of frequency.

B. Fathom is the unit of length in the imperial and the US customary systems. 1 fathom equals to 1.8 metres.

C. Nanometre is the unit of length. 1 nm equals to 1X10${}^{-9}$ m.

D. Decibels is the unit of sound. 1 dB equals 10 times the common logarithm of the power ratio

So, the correct answer is 'Decibels'