Visualisation of acoustic beames using liquid crystals

2 October 1969

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 5 (20) , 477-478
https://doi.org/10.1049/el:19690363

Abstract

A sound visualisation technique has been developed using the light-scattering properties of cholesteric liquid crystals. An acoustic wave propagating in these materials produces a local colour change, rendering the sound beam visible to the eye.

Keywords

ACOUSTIC
SOUND
CRYSTALS
COLOUR CHANGE
BEAM VISIBLE
WAVE PROPAGATING
MATERIALS PRODUCES
LOCAL COLOUR
CHOLESTERIC LIQUID

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