A stroboscopic study of lip vibrations in a trombone
作者:
David C. Copley,
William J. Strong,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1996)
卷期:
Volume 99,
issue 2
页码: 1219-1226
ISSN:0001-4966
年代: 1996
DOI:10.1121/1.414603
出版商: Acoustical Society of America
关键词: AIR FLOW;DIGITAL SYSTEMS;FIBER OPTICS;MECHANICAL VIBRATIONS;MOTION;PHOTOGRAPHY
数据来源: AIP
摘要:
The purpose of the present study was to obtain detailed photographic sequences and lip motion data on which lip models for brass instruments may be more accurately based. The study expands upon an earlier study by Martin [J. Acoust. Soc. Am.13, 305–307 (1942)] by using advanced fiber‐optic stroboscopy, a real instrument mouthpiece, and by studying two dynamic levels. The trombone was selected as representative of the brass family because its relatively large mouthpiece permitted the use of an optic probe. Lip motion was observed from the front and side for six notes (Bflat2, F3, Bflat3, D4, F4, Aflat4) played at loud and soft dynamic levels. The video sequences were used to obtain information on lip opening area, lip motion perpendicular to airflow, and lip motion parallel to airflow. The data are tabulated and represented in graphic form.
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