This investigation sought to identify sound levels potentially harmful to directors' hearing, and examine the effects of band size, instrumentation, bandroom and playing ability on sound levels. The subjects were 2 elementary, 2 middle, and 4 high school bands, in 7 rooms, 10 to 66 members, and 26 students, beginning and advanced. A sound level meter was used. Sounds were measured in flat and A-weighted decibels. Sounds measured were steady state (>.5 sec.) and impulse (<.5 sec.). Results were compared with safety limits of OSHA, EPA and Baughn's study of safety limits (1966). Results show exceedences of limits used for comparison. Small rehearsal areas and younger players seemed to cause high levels in the tests. Further testing may prove potential hazards.

The purpose of this study was to provide, through systematic investigation, empirical data to support or reject the assumption that auditory stimulation by discrete pitches evokes consistent muscle responses in the extrinsic laryngeal muscles. The study was an electromyographic investigation of specific upper and lower extrinsic laryngeal muscles as stimulated by two specific pitch stimuli. The responses were evoked by auditory stimulation, without vocalization. From these findings, it was concluded that a direct relationship exists between specific pitch stimuli and specific extrinsic laryngeal muscle responses. It was concluded that these responses likely exist in the general population.