What is the name of the instrument used to measure noise pollution?

Answer 1

Air pollution may be due to:

• particulate matter by different sizes
• odour
• haze
• gaseous substances

These materials can be measured by various monitors using samples taken at the site and measured by:

• local sensors/monitors
• light absorption and refraction
• human observation (organoleptic observation) by trained observers

Noise pollution involves sound measurement of:

• continuous noises
• impact frequencies
• peak frequency identification

Answer 2

Noise is measured in decibels (across the logarithmic scale) using a Sound level meter.