The noise in the cities affects people both in their jobs and in their houses. It disturbs us wherever we are, even when want to rest and silence is important for our health.
Noise pollution is one of the main reasons that causes stress in industrialised countries, being the noise too much for people both in many cases.
The number of people with hearing problems, caused by a continuous noise is increasing. In places where is not possible to avoid noise exposure, soundproofing is necessary in order to improve comfort and quality of life.
Continuous noise, whose annoying effects we try to reduce usually come from outside, generally caused by traffic. Recent research, show that the frequency of noise is different depending on the type of traffic.
The graphic in this page shows the connection between intensity of noise and frequency.