from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun obsolete, rare An
instrumentfor compoundingthe resultantof two parallel, simple, harmonic waves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
κῡμᾰτ- (kūmat-, the long stem of the Ancient Greek κῦμα, kūma, “wave”, whence cyma) + -graph; compare cymograph
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Acoustics were represented by an electro-magnetic brake siren of Mr. Bourbouze; Konig's apparatus for the synthesis of sounds; and Mr. S.P. Thompson's cymatograph -- a pendulum apparatus for demonstrating the phenomena of beats.
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