Harm of health noise

According to Master Luong Thuy Nga (Hanoi Polytechnic University), noise has a negative impact on human health and lowers the quality of life of society, such as obscuring the voice in information exchange, making dispersing ideas and leading to reduced labor efficiency, noise disturbing the quiet and sleep of people.

The long-term impact of noise on humans will cause insomnia, neurasthenia, as well as aggravate cardiovascular diseases and high blood pressure. According to the research results of the Center for Urban and Rural Environmental Research and Planning in 1998, on Hanoi's urban roads, the average equivalent noise level of cars is often very large and medium. daytime can range from 71.3dB to 79.2dB, night time from 67.3dB to 73.0dB.

Noise is also the cause of the reduction of human hearing, increasing neurological diseases and high blood pressure ( Photo: smh.com.au )

According to the research results of the Department of Science, Technology and Environment, at popular survey points in Hanoi (some major intersections and streets), the average traffic noise level is from 77-82dB in 2000. Compared to the previous survey results 2 - 3 years in the same time and space conditions, the average noise level increases 4-5dB. Thus, the current traffic noise level in Hanoi city is quite large, higher than the standard value allowed for public and residential areas (50-70dB in daytime). The greater the traffic noise level, the higher the level of environmental pollution increases, which means that the quality of life is declining.

A scientific research project in the US shows that the productivity of officials in a quiet state is higher when there is 9% noise and errors in document writing are less than 29%, while working In offices with noise level of 100dB, people will make mistakes twice as much as working at noise level of 70dB. In many Western countries, according to experts' calculations, due to the impact of noise, up to a quarter of the population has to use regular sleeping pills, each year in Austria has nearly 7 million people use sleeping pills and consumed 40 million tablets, while in England in 1990, doctors had to prescribe up to 20 million sedative prescriptions.

Noise is also the cause of people's hearing loss, increased neurological diseases and high blood pressure for older people. Continuous effects of noise can cause peptic ulcer disease. When there is an impact of noise can lead to reduced ability to concentrate, reduce alertness and reduce ability to work. When noise reaches 50dB at night, sleep is interrupted, deep sleep is 60% loss, when daytime noise is 70-80dB will cause fatigue, 90-110dB starts to cause danger and 120- 140dB is likely to cause injury.

According to the statistics of the health sector, the number of people with mental illness in Hanoi, a disease related to traffic noise pollution is increasing in recent years and Hanoi is one of the where there is the highest proportion of people with mental illness in the country.

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