5
Question
A range of loudness of sound of 70-90 decibels are rated as
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Solution
The correct option is A Very loud
Unwanted sound is noise and is a major air pollutant in modern times. Noise or pollutant sound has a value of 80 dB and above. Moderate conversation produces 60 dB sound, loud conversation produces 70 dB, scooter 80 dB, large vehicles such as truck and bus produce 90 dB, jet aeroplane 150 dB and rocket 180 dB. A sound of noise level between 70 and 90 dB will be very loud.
Unwanted sound is noise and is a major air pollutant in modern times. Noise or pollutant sound has a value of 80 dB and above. Moderate conversation produces 60 dB sound, loud conversation produces 70 dB, scooter 80 dB, large vehicles such as truck and bus produce 90 dB, jet aeroplane 150 dB and rocket 180 dB. A sound of noise level between 70 and 90 dB will be very loud.
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