[f. as next + Gr. φωνή sound.] An instrument (invented by Prof. Wheatstone) for exhibiting the phenomena of sound-waves, by means of a vibrating rod or plate having a reflector at the end.
1827. Q. Jrnl. Sc., 344. Description of the Kaleidophone or phonic Kaleidoscope, a new philosophical toy.
1873. W. Lees, Acoustics, II. iv. 68. The magic disc, the thaumatrope, the kaleidophone,… etc., all owe their action to this principle.
