Research on voice change in males has generally fallen into two categories: music education studies of changes in the singing voice and speech studies of changes in the speaking voice. These studies rarely consider differences in the dynamic ability of male singers at different stages of vocal development. The concept of tessitura, a portion of the vocal range in which the singer sounds best, is referred to in the literature on vocal music, but the means for identifying its size and location within the range have not been consistently specified. Tessitura appears to be a portion of the range which is most controllable in terms of dynamics and agility and is optimal in tonal quality. This study used the phonetograph to investigate differences in measures of intensity control between pre-pubertal, pubertal (changing) and post-pubertal voices in 48 males aged 9 to 18 years old. These intensity measures were compared to ratings of vocal effort from a panel of 4 music educators in order to determine if tessitura could be identified from acoustic and perceptual evidence of an optimum vocal area. Results of the study were: 1) post-pubertal voices demonstrated greater control of vocal intensity as revealed in lower mean minimum …

Students' perspectives in jazz education have gone largely ignored. A modified analytic inductive design allowed me to look broadly at the students' jazz band experience while specifically investigating their views about playing individualized parts, improvising, and interpreting and articulating swing rhythms. A focus group procedure was altered (Krueger, 1995) and incorporated into my teaching of 19 students. Two 30 minute sessions per week over a 12 week period were video- and audiotaped. Audiotaped exit interviews provided data in a non-social environment. All data were transcribed and coded in order to identify major themes and trends. Conclusions were verified through member checks, several types of triangulation and other qualitative analysis techniques. Trustworthiness was determined through an audit. Cognitively and physically, students had to accommodate musical techniques as these differed from those used in concert band. Some students were confused by the new seating arrangement and the playing of individualized parts. While some students could perform distinctly different swing and straight interpretations of the same song without external cues, others could only perform this task with external cues. Some changes in articulation were well within the students' capabilities while other techniques were more difficult to accommodate. Several students felt 'uptight' while they …