A preliminary study of a surface wave-acoustical normal mode resonance in a fluid-filled rectangular waveguide with pressure-release boundaries
Davis, Norman Ewing
Kenyon, Morton William
Coppens, Alan B.
Sanders, James V.
MetadataShow full item record
Studies of the effects of sinusoidal surface waves on the propagation of sound in a waveguide reveal a significant resonance effect under certain "matching" conditions of the wavelength of the surface wave and the wavelength of the acoustical sound field. An acoustic waveguide with constant cross-section and pressure release boundaries was designed with a termination to minimize reflection of both surface and acoustic waves so that traveling surface wave and traveling acoustic waves could be generated simultaneously. With acoustic and surface waves present, the existence of predicted resonances was verified and a strong resonance was examined for comparison with theory. The predicted effects have been qualitatively and quantitatively supported.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Arcuni, Philip W. (1966-05);A model experiment was performed to measure acoustic reflection from a rippled sand surface using a pulse-echo system employing electrostatic transducers over the frequency range 100-350 kHz. The ripple wavelength of ...
Predicting the effects of sea surface scatter on broad band pulse propagation with an ocean acoustic parabolic equation model Ead, Richard M. (Monterey, California. Naval Postgraduate School, 2004-06);Littoral waters when compared to the open ocean create an environment of greater reverberation with acoustic energy scattering from the sea surface, bottom, topographic features, and regions that lack homogeneity within ...
Baynes, Alexander B.; Godin, Oleg A. (2017);Rayleigh scattering, in which the wavelength is large compared to the scattering object, is usually studied assuming plane incident waves. However, full Green’s functions are required in a number of problems, e.g., when a ...