Noise pollution is created if sound is in excess to

The correct answer is 80-99 dB.

Important Points

• Grades of ambient noise pollution are as follows according to noise pollution control and regulations Rules 2000;
  • Industrial areas: 70-75 dB
  • Commercial areas: 55-65 dB
  • Residential areas: 45-55 dB
  • Silence zone: 40-50 dB
  • Indoor limit: <30 dB According to WHO
• Noise greater than 75 dB over long exposure can cause hearing damage.
• Noise above 120 dB can cause biochemical changes in human bodies.

Additional Information

• Section 2 (a) of the Air (Prevention and Control of Pollution) Act, 1981, includes noise in the definition of pollutants.
• Noise Pollution Control and regulation Rules, 2000 are framed under the Environment Protection Act, 1986.
• The frequency range between 20-20000 Hz is an audible range for the human ear.
• A firecracker generally generates about 125 dB of noise.
• According to a 2015 report by the European Commission, 1.3 billion people suffer from hearing impairment due to noise exposure.