Test: Noise Pollution and its Effects - Civil Engineering (CE) MCQ

Noise pollution is measured in terms of decibel (dB). This parameter depends on the various environmental conditions. If the decibel level increased than the threshold it causes problems to humans and other organisms.

Noise is defined as an undesirable and unwanted sound. Noise pollution affects human health and can contribute o a general deterioration of environmental quality. Several sources of noise pollution contribute to both indoor and outdoor noise pollution.

Decibel of the threshold of hearing is 0, for the rustle of leaves the dB is 10, for broadcasting studio dB is 20 and for Bedroom at night the dB is 30. This dB various based on the noise and the environmental conditions.

Noise pollution can cause various health impacts on humans and other organisms. This health impacts leads to various issues like reduced in the mental health, hearing loss either temporary or permanent, loss in efficiency and many more.

Instantaneous rapture of the membrane occurs at the decibel of 150. Threshold of pain is caused at the decibel of 146. If the noise level increased to 150 decibels than within no time there will be an instantaneous rupture of membrane occurs.

Threshold of pain is described as the maximum level in which one can sustain the noise after this the noise and cause several health related issues and it even damage the hearing capacity permanently or temporarily.

Temporary hearing loss is often called a ‘temporary threshold shift’. People suffering from this condition are unable to detect weak sounds. If a person got this problem, hearing ability is usually recovered within a month of exposure.

The ambient noise level in residential zone during night period is 45 dB. During day time the ambient noise levels in the residential area are 55 dB. Ambient noise levels are different for commercial zone and industrial zones.