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| Q. |
The unit of noise pollution (level) is – |
| A. | decibel |
| B. | decimal |
| C. | ppm |
| D. | None of these |
| Answer» A. decibel | |
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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 to measure the intensity or loudness of sounds. A sound can also be measured. by its pitch, which is the frequency of sound vibrations per second. |
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