The SciencesSoundless Sound WavesThe Odd Realm of Supersonics-Inaudible, Versatile Vibrations-is Receiving Increasing Attention From ScientistsBy Walter L. Finlay on March 1, 1940AdvertisementABOUT THE AUTHOR(S)Recent Articles by Walter L. FinlayPlain Water's UnplainnessFighting FrictionSoundless Sound Waves