This report concers the hearing assessment performed for musicians involved in a pop-rock band who often attend to a rehearsal place (twice per week). Hearing threshold determination as well as otoacoustic emissions are obtained before and after rehearsal. The purpose is to document the temporary changes in hearing encountered for each group member to convince them about the neccessity of protecting their hearing. To realise about the effects to being exposed to intense loud sounds, musicians are compared in terms of their hearing with a non-exposed population composed of twelve subjects who reported normal hearing function. Eventually, the noise exposure level monitored at both rehearsal and an eventual concert are to be contrasted observing moderate hearing losses of the potentially visitors.