Sound becomes hazardous noise pollution at level aboveA. 30 dBB. 120 dBC. 80 dBD. 150 dB

The correct answer is C) 80 dB.
Noise pollution refers to unwanted or harmful sounds that can have detrimental effects on human health and well-being. It is typically measured in decibels (dB), a unit that quantifies the intensity of sound.
The threshold at which sound becomes hazardous, particularly in terms of causing hearing damage or leading to other health issues, is generally considered to be above 80 dB.
Why 80 dB?
• 80 dB is the level where continuous exposure to sound can begin to have negative effects on hearing. Prolonged exposure to noise levels at or above this threshold can cause hearing loss or other auditory issues.
• Sounds at this level are often found in environments such as busy streets, heavy machinery, and loud music concerts.
Understanding Other Options:
• A) 30 dB: This is considered a very quiet sound level, like a whisper or quiet room. It is not hazardous to human health.
• B) 120 dB: While this is indeed loud and can cause immediate damage if exposed to it for even a short duration, it is considered more of an acute danger rather than the threshold for general noise pollution.
• D) 150 dB: This is extremely loud, typically associated with jet engines or explosions. Immediate damage to hearing can occur at this level, but it is much higher than the typical threshold for hazardous noise pollution.
Sound becomes hazardous noise pollution at levels above 80 dB, making C) 80 dB the correct answer.