In music schools, indoor sound quality is a necessity since students and trainees are learning and improving their skills by listening to their own instruments or voices. This study investigates how the perceived singing effort influences the singer preferences in individual music practice rooms as it is focused on as well as the optimum reverberation time. Three different room settings were determined according to the amount of reverberation time, consecutively (from dead to live). Data was taken from 30 classical singing trainees using questionnaires at Bilkent University, Faculty of Music. Results have shown that the majority of trainees choose a room setting with 0.8 s RT to practice in.