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Vol 41 No 11995
Efficiency of Jet Mufflers in FiniteLength Air Ducts
TimeSpace Structure of the Sound Field in the Geometric Shadow Zone
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Academy of Sciences acoustic field acoustic waves Akust algorithm amplitude angle antenna approximation array attenuation axis bottom bubble calculated characteristics coefficient components corresponding curve density dependence depth determined diffraction distance duct effect elastic equation estimate experimental expression formula frequency range function Green's function half-space horizontal hydroacoustic hydrophone impedance increase inhomogeneities intensity internal internal waves layer linear lithium niobate longitudinal waves maximum measured medium method mode Moscow Nauka Nizhnii Novgorod noise nonlinear Nonlinear Acoustics normal obtain Ocean Original Russian Text oscillations parameters phase Phys piezoelectric piezoelectric effect plane problem propagation pulse quency radiation reflected reflection coefficient region resonance Russia Received Russian Academy Russian Text Copyright sample scattering shadow zone shear waves signal solution sound field sound velocity spatial spectra spectrum structure surface tion transducer ultrasonic values vector vertical vibrations waveguide zone