The purpose of this investigation was to study the acoustical characteristics of the school instrumental music rooms that have been adjudged satisfactory by the music teachers who use them. Public‐school band and orchestra directors long have realized that special acoustical considerations must be given to the rehearsal space assigned to them for teaching purposes if they are to teach critical listening, intonation, musical balance, tone production, and dynamic control of tonal intensity. These attributes cannot be taught within the same acoustical conditions as that of the normal classroom or performance situation. This study located six rehearsal rooms that were reported as being satisfactory acoustically for teaching purposes. These rooms were analyzed for their acoustical characteristics. The study revealed that the several common factors existing among the six rooms differ considerably from the present standards of school musicroom construction.