3D30.32 - Cylindrical Pipes
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.
- J. W. Jewett, Jr., "AIr Column Resonance Spectra Using Basic Laboratory Equipment", AJP, Vol. 48, #1, Jan. 1980, p. 24.
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