(obsolete, physics) A device, consisting of a reflectiveball attached to a vibrating rod or plate, that produces opticalfigures that correspond to the mode of vibration of the rod or plate
(obsolete, physics) A device, consisting of a reflectiveball attached to a vibrating rod or plate, that produces opticalfigures that correspond to the mode of vibration of the rod or plate
Kaleidophone on display at Palais de la Découverte in Paris.