Code Number: 3D30.32

Demo Title: Cylindrical Pipes

Area of Study: Oscillations & Acoustics

Equipment:

Several demo pipes are available. Some with holes and some without.

Procedure:

The pipes with the holes down the length have a “band gap” like a semiconductor due to the periodic holes. In musical instruments like a clarinet it is called the “tone-hole cut-off”. Tone holes are not periodic, but the effect is similar.

References:

J. W. Jewett, Jr., "AIr Column Resonance Spectra Using Basic Laboratory Equipment", AJP, Vol. 48, #1, Jan. 1980, p. 24.

Disclaimer

These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.

Instructional Resources and Lecture Demonstrations

3D30.32 - Cylindrical Pipes

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