Within the scope of action of the Pla director Smart City Terrassa is the Sentilo Terrassa Project and within the lines of action of the Pla de Reducció del Soroll de Terrassa there is the line Millora de la qualitat acústica de l’espai públic with the actions Programa de control de soroll de la flota de vehicles pesants de serveis públics and Renovar la flota d’autobusos.

It has been possible to carry out thanks to the noise sensors acquired by Servei de qualitat ambiental and his requirement of the study, to CESVA instruments by opening to directly sending to sentilo Terrassa the sensors they made and with detailed data to the second, to Servei de mobilitat, TMESA and el Grupo avanza allowing access to buses data, and to GMV innovating solutions developers of the SAE of Grupo avanza by giving the technical details of the API and thus achieve develop a daemon that incorporates the bus dates to Sentilo Terrassa.

Assuming that the intensity I of the buses produced noise follows with the time t  a model where

k is the sound intensity of the bus at 1m away, v is the pass speed, D is the minimum pass distance, and f  is the intensity of the background noise.

The acoustic impact will be the accumulation of the noise intensity throughout. The time removing the background noise, in our model k ·π / v · D

By adjusting the average data of all the passes of each type of bus to the model we obtain the different

values of k, v and f  as well as the quality of the adjustment and the value of the acoustic impact


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