Description : The unit of noise pollution (level) is – (1) decibel (2) decimal (3) ppm (4) None of these
Last Answer : (1) decibel Explanation: Noise pollution refers to any unpleasant, damaging or irritating noise that has the potential to harm people, wildlife or the environment. The decibel (dB) is the main unit used ... can also be measured. by its pitch, which is the frequency of sound vibrations per second.