Le Nost G., Viollon S., Marquis-Favre C.

Controlling the environmental noise impact of industrial facilities goes through a better understanding of the perception of the different noise sources. A first step in this way consists in creating a perceptual typology of the sources, that will be helpful to assess their relative annoyance. This paper presents a typology of permanent industrial noise sources, resulting from a categorization test with realistic sound stimuli, which was carried out in laboratory conditions. Using a physical classification of major industrial sources, about 50 permanent sources have been recorded separately and close to the source so as to avoid unwanted noises. Sound stimuli are then created by filtering the recordings in order to simulate the sound attenuation between the recording point and a receiver point which would represent a dwelling located further away from the source. In a previous study, the software calculation parameters have been chosen to get a realistic rendering of the filtering, both from a physical and perceptual point of view. A series of categorization tests are set up with these stimuli, resulting in a typology of the sources as they would be perceived at the receiver point. Listening tests protocols and results are detailed.