This article examines how future teachers perceive the acoustic contamination and its deleterious effects. It analyses their acoustic habits, with the aim of raising their awareness concerning this problem. The authors designed a number of activities, applied during a practical lesson, in which students evaluated some of their perceptions and attitudes towards noise, and recorded their hearing capacity. The results suggest that most students are unaware of the risks of many of their activities. However, the perception of noise as a contaminant and the appreciation of its danger increased in the students after the performing of the practice.