Question

Sound becomes hazardous noise pollution at
level
(a) above 30 dB (b) above 80 dB
(c) above 100 dB (d) above 120 dB

Answer 1

Answer:

D)

Explanation:

Sound becomes hazardous above 120 dB

Answer 2

Sound becomes hazardous noise pollution at level above 80 dB.

Option (b).

Explanation:

• Sound is defined as when the sound waves pass through the medium of air it made a vibration of the molecule.

• The level of sound is measured by decibels(dB).

• The average sound level which is measured below 60 typically does not cause any damage to our ears.

• The sound level of more than 80 dB can cause noise which leads to dangerous hearing loss.

• This kind of noise will also affect our health by causing blood pressure and many disorder.

• Hence, the correct answer is 'Above 80 dB'.

• City traffic can contain the sound level up to 80-85dB

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