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ERIC Number: EJ1085703
Record Type: Journal
Publication Date: 2016-Jan
Pages: 2
Abstractor: As Provided
ISSN: ISSN-0031-921X
An Inexpensive and Versatile Version of Kundt's Tube for Measuring the Speed of Sound in Air
Papacosta, Pangratios; Linscheid, Nathan
Physics Teacher, v54 n1 p50-51 Jan 2016
Experiments that measure the speed of sound in air are common in high schools and colleges. In the Kundt's tube experiment, a horizontal air column is adjusted until a resonance mode is achieved for a specific frequency of sound. When this happens, the cork dust in the tube is disturbed at the displacement antinode regions. The location of the displacement antinodes enables the measurement of the wavelength of the sound that is being used. This paper describes a design that uses a speaker instead of the traditional aluminum rod as the sound source. This allows the use of multiple sound frequencies that yield a much more accurate speed of sound in air.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A