“…No research was located, for example, involving evaluation in loco, which is extremely important to identify habits, postures, working conditions and aspects of the environment which directly interfere in the voice and in the life of popular singers. Tools to collect data used in the researches were: perceptiveauditive evaluation, used in 12 studies (22)(23)(24)(25)(26)(28)(29)(30)(31)(32)(39)(40) ; questionnaires, used in seven researches (22,23,27,32,33,35,41) ; acoustic analysis, used in five studies (23,24,26,32,39) ; imaging evaluation, included videolaryngoscopy, nasofibrolaryngoscopy and videofluoroscopy, used in five studies (23,26,31,(39)(40) ; interviews in two studies (29,34) ; and a literature review, used in four studies researched (33,(36)(37)(38) .…”