4 Impact of noise pollution on humans

4 Impact of noise pollution on humans
Noise pollution is the excess noise that affects the physical and mental health of the population. It is the high level of decibels caused by the constant noise from activities that disturb the environmental silence.

Noise pollution is considered an environmental crime, which may result in a fine and imprisonment of 1 to 4 years.

Noise and visual pollution are types of pollution that often go unnoticed by being part of the daily lives of the residents of large cities.

However, they cause damage to the environment and human health, seriously affecting the quality of life.


The level of noise admitted to large urban centers by the World Health Organization (WHO) can reach up to 50 decibels however, which is usually verified reaches 90 and 100 decibels.

Therefore, any sound that exceeds 50 decibels can already be considered harmful to health.

The harmful sounds that exceed the levels considered normal by the human ear, come from different means, among them:

  • urban transport;
  • the horns and sirens;
  • the constructions;
  • the machines;
  • concert houses and religious temples;
  • the stereos, among others.

In addition, the frequent use of individual sound reproduction devices such as headphones, MP3 and iPad, causes serious problems and even hearing loss, especially in children and adolescents.

According to WHO data, noise pollution is considered one of the most affecting the environment, second only to air and water pollution. For some European environmentalists, it is already considered the most harmful form to human health.

Impact on humans

Below are some of the bad effects of noise pollution, namely as follows:

1. Hearing Loss

One of the impacts of noise pollution is hearing loss. As reported on the CDC page, hearing loss can occur when the part of the ear or nerve that carries sound information to your brain does not work as usual. Noise pollution is harmful to the inner ear (cochlea). This condition will continue to get worse when you are exposed to loud noises for a long time. This effect is generally temporary, but it is not uncommon for it to be permanent.

2. Sleep Disorders

Noise certainly has a big impact on sleep quality. Exposure to too much sound has an immediate effect while we sleep, can cause short-term problems the next day, and can cause mental and physical disorders in the long term. In addition, noise pollution at night can cause increased production of hormones such as adrenaline, cortisol and blood pressure.

3. Cardiovascular Disease

According to research from Harvard that studied nearly 500 adults over the course of a year, it was found that every 5 decibel increase in 24-hour average noise levels was associated with a 34% increase in heart attacks, strokes and other serious heart disease. High noise levels increase activity in the amygdala (the part of the brain that processes stress).

4. Mental Disorders

The next impact of noise pollution is mental disorders. Constant exposure to this sound can cause you to feel emotional and stressed. If you can’t handle it, this stress can develop into mental disorders in the future such as depression and anxiety disorders.


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