Kundt's tube

Kundt's tube is an experimental acoustical apparatus invented in 1866 by German physicist August Kundt^[1]^[2] for the measurement of the speed of sound in a gas or a solid rod. The experiment is still taught today due to its ability to demonstrate longitudinal waves in a gas (which can often be difficult to visualise). It is used today only for demonstrating standing waves and acoustical forces.

^ Kundt, A. (1866). "Ueber eine neue Art Akustischer Staubfiguren und über die Anwendung derselben zur Bestimmung der Shallgeschwindigkeit in festen Körpern und Gasen". Annalen der Physik (in German). 127 (4). Leipzig: J. C. Poggendorff: 497–523. Bibcode:1866AnP...203..497K. doi:10.1002/andp.18662030402. Retrieved 2009-06-25.
^ Kundt, August (January–June 1868). "Acoustic Experiments". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. Vol. 35, no. 4. UK: Taylor & Francis. pp. 41–48. Retrieved 2009-06-25.

[1] Kundt, A. (1866). "Ueber eine neue Art Akustischer Staubfiguren und über die Anwendung derselben zur Bestimmung der Shallgeschwindigkeit in festen Körpern und Gasen". Annalen der Physik (in German). 127 (4). Leipzig: J. C. Poggendorff: 497–523. Bibcode:1866AnP...203..497K. doi:10.1002/andp.18662030402. Retrieved 2009-06-25.

[2] Kundt, August (January–June 1868). "Acoustic Experiments". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. Vol. 35, no. 4. UK: Taylor & Francis. pp. 41–48. Retrieved 2009-06-25.

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