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ERIC Number: EJ817553
Record Type: Journal
Publication Date: 2008-Mar
Pages: 10
Abstractor: As Provided
Reference Count: 11
ISBN: N/A
ISSN: ISSN-0143-0807
Tuning the Pitch of a Wine Glass by Playing with the Liquid inside
Courtois, Matthieu; Guirao, Boris; Fort, Emmanuel
European Journal of Physics, v29 n2 p303-312 Mar 2008
It is well known that the pitch of the sound produced by an excited glass shell can be tuned by adding some liquid in it. In this paper, it will be proved that the distribution of the liquid inside the shell plays a crucial role in this frequency shift. Thus it provides another way to tune the pitch of the sound by modifying the liquid distribution inside the glass. Both adding a cylinder in the liquid or rotating it results in a pitch lowering. A simple model based on energy conservation is in good agreement with the measured experimental results. This paper assumes some basic knowledge about mechanics and hydrodynamics. It addresses instructors of physics at the undergraduate and advanced secondary school level as well as their students. (Contains 4 figures and 1 footnote.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://www.iop.org/EJ/journal/EJP
Publication Type: Journal Articles; Reports - Research
Education Level: High Schools; Higher Education
Audience: Students; Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A