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An Acoustical Study of Individual Voices in Choral Blend
The purpose of this study was to investigate the phenomenon of choral blend through acoustical analysis of individual vocal sounds. One aspect of the study involved identifying and comparing the acoustical qualities of sounds produced in the usual solo manner and sounds produced by the same singers attempting to blend with a unison ensemble. Another aspect of the study involved identifying and comparing the acoustical qualities of vocal sounds identified as blending well and poorly with a unison ensemble. Singers attempting to blend adjust their overall intensity not only to affect the perceived loudness of their tones, but also to facilitate other acoustical changes which are helpful for achieving blend. Vocal blend apparently may be achieved more readily on vowels having few upper partials than on vowels having numerous upper partials. Where vibrato is employed, certain vocal sounds can achieve a good blend even though their fundamental frequencies only approximate the theoretically correct frequency. There apparently is an interaction between the vibrato of a vocal tone and its spectral features, making it advantageous for the singer to adopt mutually beneficial approaches to both factors in order to blend. Vowel modification effective for achieving vocal blend- -at least for sopranos-- appears to consist primarily of changes in the intensity relationships between the vowel formants. Singers' variations in frequency extend beyond the boundaries of any system of tuning or temperament.
An Evaluation of the Music Programs in the Seventh-Day Adventist Academies in the United States
The purpose of this study was to survey and evaluate the music programs in Seventh-day Adventist academies in the United States during the 19 75-76 school year. Data were collected by means of a survey form sent to all principals and music teachers in the eighty schools and a music achievement test administered to graduating seniors in twenty-eight randomly selected academies. Although most departments judged the music facilities to be adequate, library materials such as scores, filmstrips, and in-service resources were needed in the majority of schools. One-half of the music programs did not have listening facilities available for classroom use. Comparing achievement test results for graduating seniors in Adventist schools with those of the standardization sample revealed no significant differences. The null hypothesis was rejected, however, when comparing size of school, location of school, type of school (boarding or day), sex of the student, and amount of piano and instrumental experience.
Improvisation in the Beginning Piano Class
The problem was to survey and collect ideas on the use of improvisation as a teaching and learning tool in elementary piano instruction and to prescribe activities and exercises for second through fourth grade piano classes. These areas were examined: philosophies and theories influencing traditional instruction, effects of creative keyboard activities on children's musical development, specific teaching strategies using improvisation, evaluative procedures, and suitability of materials for young children. Data collected from published and unpublished materials were classified, and presented concerning the feasibility of using keyboard improvisation with early elementary children. It was found that suitable improvisational exercises allow the child to organize his perceptions into the basic concepts of music. Recommendations for teachers and researchers were made.
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