ionophone
(aɪˈɒnəʊfəʊn)
[f. iono- + -phone.]
A type of loudspeaker using the vibrations of a volume of ionized air in place of those of a diaphragm.
| 1955 Sci. News Let. 23 July 63/3 The vibrating pocket of air in the new loud speaker, called the Ionophone, will create the sound without this setback, the designers say. 1962 A. Nisbett Technique Sound Studio 257 Ionophone, a type of loudspeaker which has no moving parts. |