Noise pollution should not be underestimated

Noise is an agent related to people, old or young, going to the street or at home, or to the workplace . Noise pollution is harmful to health. Noise can also be one of the causes of increased violence in communication.

The general knowledge of noise is not merely scientific knowledge but also a topical issue in the industrial life that has many risks of increasing pollution; including noise pollution has not been properly concerned.

Step noise

Décibel is a unit of noise measurement. Please do not go into this concept, but just give examples to help people understand it in detail:

- 10-20 dB: The wind blowing through the leaves is considered a quiet state

- 30 dB: Whisper (in the bedroom

- 40 dB: Normal voice

- 50 dB: The sound of the washing machine, the noise at the supermarket, is annoying but it is still tolerable

- 55 dB -80 dB: Motor car, motorcycle, annoying, tired

- 80 dB - 85 dB: Lawn mower, dust collector, wood cutter, very uncomfortable

- 90 dB - 100 dB: emitted at construction site, noise at dangerous level

- 120dB - 140 dB: Airplane takes off, noise is too loud, causing damage to the mind

The examples above, besides the dB numbers are only approximate examples, approx.

The farther away from the noise source the noise level decreases and decreases very quickly. In the middle of the road, the noise of vehicles may be 80dB but on the curb where pedestrians are only about 60dB for example.

Without a meter, it can be estimated based on the ability of the ear to distinguish: the loud noise is about 80 dB, the ear ache is about 90dB. On the other hand, we can't stand it and react immediately to protect ourselves by putting our hands over our ears. Living and working in noise for a long time is also "familiar", we are out or less uncomfortable but the consequences of noise are still "silently" recorded in our bodies.

Weekend walks in the countryside, summer holidays in the hills, or in the sea, between the sounds of the thousands or the sound of waves crashing, giving us a pleasant, relaxing feeling: one of the feelings This pleasant feeling is because our brain is not "attacked" by the noise.

Consequences of noise pollution

In short, noise pollution is harmful physiologically, psychologically and socially influential.

Physically , above a certain level, noise causes ear injury, deafness. In a noisy environment, we are susceptible to sleep sickness (sleeplessness, disturbed sleep structure).

Living in noise, you can get headaches, become chronic diseases, lose your ability to work, or at least lose your life value. More dangerous are cardiovascular diseases and blood pressure.

Psychologically, noisy environment can cause stress, nervousness, irritability, impatience, aggression, agitation, .

Socially , in noise, we often judge others, doubt and fear before others, have difficulty contacting others, .

Those are the results that have been taken seriously by the studies. Of course, these conclusions must be manipulated in moderation. The consequences of noise depend on the time of noise and the response or the ability to 'adapt' the individual noise level.

Watch out for noise

- Under 80 dB, no noise protection equipment is required. I can stand it. But over 80 dB, you must start to pay attention to the danger

- At the level of 90 dB, without protection, each day we only have a maximum of one hour, more will have damage to the ears (deafness, for example)

- If you have to suffer 100dB, every day only for a maximum of 15 minutes, construction workers must wear protective equipment in the ear.

- At a level of 105 dB or more, people can only take a maximum of 5 minutes a day, the damage is later (not only in the ear but also in the brain).

The lesions vary depending on the noise level, the distance between us and the noise source and noise duration. Many injuries - for example - are permanent, non-renewable lesions. Therefore, we must prevent and not wait to hurt.

Prevent

The agencies with social management functions need to make regulations to prevent noise pollution in the street (not to use car horns, not to let old cars, engine cries and exhaust more smoke circulated); do not use loudspeakers to broadcast information on the street; limit the noise emitted from restaurants, discotheques . especially at night .

For prevention for individuals, it is possible to wear noise-resistant hats when working at construction sites, at airports or when cutting trees in forests.

In every family, do not turn the TV loudly, do not listen to loud music all day, adjust the phone ring, avoid noise (dance hall, karaoké, music festival, fair).

Closed doors, noise protection for buildings in cities (noise-proof walls and glass doors as well as insulated glass walls and doors).

For schools, the school grounds are as wide as possible and there is no roof - if not, like the bees breaking the nest, the children shout in the yard, turning this place into an environment of noise pollution. and finally, after the play time, the children are tired, their ability to pay attention will be poor and not good!

Some examples in Europe about noise

People have a general law and a living culture of the people: in the city and especially in the apartments, do not make noise after 10 pm.

Vehicles must have noise reduction equipment, so are airplanes and are more strictly controlled. Around airports, there are no houses within the limit of noise above 55 dB (in Belgium, this limit is stricter: only houses with noise levels below 45dB).

Parents have the right to force schools to find solutions when the noise in the schoolyard exceeds 50dB - 60 dB.

The market economy itself constitutes the laws of supply and demand related to noise: houses on traffic axes are difficult to sell and are cheaper than houses in quiet areas, for example (although on the roads, more convenient for moving!).