Conclusions
•5 of the 13 devices have a time limit below 1h
•Most users declared a 1 to 2 hours average usage
•A proper hearing risk assessment should consider a whole day, with all its activities.
•A lot of money has been spent for reducing the noise at the workplace, but this will be wasted if we allow our teenagers to be over-exposed for years due to the usage of personal digital audio players capable of dangerous levels.