consequences.
Noise pollution (or environmental noise) is displeasing human, animal or machine—created sound that disrupts the activity or balance of human or animal life. The word noise comes from the Latin word nauseas, meaning seasickness.

The source of most outdoor noise worldwide is mainly construction and transportation systems, including motor vehicle noise, aircraft noise and rail noise. Poor urban planning may give rise to noise pollution, since 'side-by-side industrial and residential buildings can result in noise pollution in the_ residential area.

Indoor and outdoor noise pollution sources include car alarms, emergency service sirens, and mechanical
Equipment, Heelworks, compressed air horns, grounds keeping equipment, barking dogs, appliances, and lighting
Hum, audio entertainment systems, electric megaphones, and loud people.

Human Health

Noise health effects are both health and behavioral in nature. [Citation needed] The unwanted sound is called
Noise. This unwanted sound can damage physiological and psychological health. Noise pollution can cause
Annoyance and aggression, hypertension, high stress levels, tinnitus, hearing loss, sleep disturbances, and
other harmful effects. Furthermore, stress and hypertension are the leading causes to health problems,
whereas tinnitus can lead to forgetfulness, severe depression and at times panic attacks.
I chronic exposure to noise may cause noise induced hearing loss. Older males exposed to significant
Occupational noise demonstrate significantly reduced hearing sensitivity than their non-exposed peers, though
Differences in hearing sensitivity decrease with time and the two groups are indistinguishable by age 79. A
Comparison of Maaban tribesmen, who were insignificantly exposed to transportation or industrial noise, to a
Typical U.S. population showed that chronic exposure to moderately high levels of environmental noise
Contributes to hearing loss.
High noise levels can contribute to cardiovascular effects and exposure to moderately high levels during a
single eight hour period causes a statistical rise in blood pressure of Eve to ten points and an increase in stress
and vasoconstriction leading to the increased blood pressure noted above as well as to increased incidence of
Coronary artery disease.
Noise pollution is also a cause of annoyance. A 2005 study by Spanish researchers found that in urban areas
Households are willing to pay approximately four Euros per decibel per year for noise reduction.

Environment

Noise can have a detrimental effect on animals by causing stress, increasing risk of death by changing the •
Delicate balance in predator prey detection and avoidance, and by interfering with their use of sounds in
Communication especially in relation to reproduction and in navigation. Acoustic overexposure can lead to
Temporary or permanent loss of hearing.

An impact of noise on animal life is the reduction of usable habitat that noisy areas may cause, which in the
Case of endangered species may be part of the path to extinction. Noise pollution• has caused the death of
Certain species of whales that beached themselves after being exposed to the loud sound of military sonar.

Noise also makes species communicate louder, which is called Lombard vocal response. Scientists and
Researchers have conducted experiments that show whales' song length is longer when submarine-detectors
are on. lf creatures do not "speak" loud enough, their voice will be masked by anthropogenic sounds. These
Unheard voices might be warming, finding of prey, or preparations of net-bubbling. When one species begins
Speaking louder, it will mask other species' voice, causing the whole ecosystem to eventually speak louder.

European Robins living in urban environments are more likely to sing at night in places with high levels of
noise pollution during the day, suggesting that they sing at night because it is quieter, and their message can
propagate through the environment more clearly. The same study showed that daytime noise was a stronger
predictor of nocturnal singing than night-time Light pollution, to which the phenomenon is often attributed.

Zebra flinches become less faithful to their partners when exposed to traffic noise. This could alter a
population’s evolutionary trajectory by selecting traits, sapping resources normally devoted to other activities
and thus lead to profound genetic and evolutionary