URBAN NOISE INDICES IN THE DAY WITHOUT CAR IN THE MEDELLIN CITY ÍNDICES DE RUIDO URBANO EN EL DÍA SIN CARRO EN LA CIUDAD DE MEDELLÍN

The present article attempts to discover through ambient noise and traffic flow data, the change of the soundscape in the city of Medellin during the implementation of car-free day on Thursday, April 22, 2010, for which they had reference to four significant points of the city: Monterrey, Alpujarra, Railroad Avenue and 33rd Street. For the data acquisition process was measured, both in the day without a car, like a car day and is based upon Resolution 0627 of 2006 "By which sets the national standard for noise emission and noise "and the ISO 1996" international standard that contains the description, measurement and evaluation of environmental noise. " It was important to note in this study, the incidence of private cars in urban noise that has the city of Medellin, analyzing the measurements from this day, and finding functional congruence between urban noise and cars.