"Observing Density Through Standing Waves" by Efthymios Chatzigiannis


This piece explores the way in which sound is affected by the density of the medium in which it is being produced, and the resulting effects on the pitch of the sound. Four different tubes are used, filled with mediums of different densities: air, sunflower oil, water and shampoo. Microphones are fitted at the bottom of each tube, which are connected to a speaker at the top of the tube, thus producing a continuous feedback and creating a standing wave inside the tube. The pitch of this standing wave depends on the density of the medium; dense molecular structures vibrate at slower speeds and produce lower frequencies. It was exhibited in the Richard Hamilton Building at Oxford Brookes University during Audiograft 2011 from the 14th to the 19th February 2011.


installation, sound art, sonic art, art, gallery art,



Chatzigiannis, Efthymios


Research Group: Sonic Art Research Unit

Oxford Brookes departments

School of Arts


Year: 2011

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Related resources

This RADAR resource is Part of Audiograft