Noise affects population from physical and psychical point of view. If the 40 dB level noise provokes sleeping disorders , a 55 dB level noise creates significant disturbance. At greater levels of 65 dB, noise affects seriously human health, acting in the first place on cardiovascular system and could get to (or aggravate) affections as hypertension,  ischemia and others. At levels over 80 dB noise produces progressive and cumulative deterioration of  hearing even if is for short time exposure, like minutes. These aspects are underlining impact exposure adjustment  importance at noise on population and establishing clear limits for level noise. In general the 50 dB value is considered as being the most adequate maximum limit admitted during day time for equivalently exterior buildings noise level, in urban environment. In this paper we try to emphasize the significant impact of road traffic in the urban noise generation and the fact that urban noise is the only environmental factor that degrades its quality with the passing of time.

noise; dB; level noise; people; traffic

Presentation: oral