EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -So, sound above 80 dB is harmful to the human ear. Additional Information: The allowable noise level in India has been set by the CPCB for various areas. The acceptable maximum in industrial areas is 75 dB during the daytime and 70 dB at night.

Detailed explanation-2: -Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

Detailed explanation-3: -80 decibels is fairly loud. It’s equivalent to the noise of a busy downtown street. Being loud, it is a noise level that may harm your hearing if you are exposed to it for longer periods (more than 8-10 hours/day). There’s no better way to understand how loud 80 dB is than to take examples from everyday life.

Detailed explanation-4: -Permissible noise level in India In industrial areas, the permissible limit is 75 dB for daytime and 70 dB at night. In commercial areas, it is 65 dB and 55 dB, while in residential areas it is 55 dB and 45 dB during daytime and night respectively.

Detailed explanation-5: -For commercial areas, the daytime permissible limit has been set at 65 decibels and 55 decibels for night. Meanwhile, the permissible limit is 55 decibels in residential areas and 45 decibels in night. In silence zones, 50 decibels has been set as the permissible limit for daytime and 40 decibels for night.