You searched for: “spectrophonic
spectrophone, spectrophonic
1. A device in which a body of gas may be caused to emit sound waves when illuminated by a periodically interrupted beam of electromagnetic radiation (usually, visible or infra-red).
2. An instrument constructed on the principle of the photophone and used in spectrum analysis as an adjunct to the spectroscope.
3. Spectrophone measurements of the absorption of visible light by aerosols in the atmosphere.