Experts have found out what is dangerous metro. It is noted that a noise level of over 80 dB can significantly harm human hearing, and in the subway this mark is often exceeded.

It is reported that the above noise level can damage a person's hearing if he is exposed to him more than 8 hours. Most people spend a long time in subways. Auditory receptors of metro passengers perceive extremely loud noise constantly, as a result of which their sensitivity decreases.

Experts are sure that a long stay in the metro, in particular in the trains themselves, can lead not only to damage to the hearing, but also to deafness.

Source: belta. by.