The questionnaire contains two main components namely "measuring ability of hearing fromtherecreational facilitiesandthe ability to communicateat the end ofthe work shift (questions from 7 to11)" and "Self-evaluate hearing ability when comunicating with others (questions from 1 to 6, and 12)". Compared with audiological results, self-administered questionnaire had sensitivity of 80.2% (95% CI: 70.2 - 88.0), and specificity of 56.2% (95% CI: 51.2 - 62.0).