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Abstract The azimuth directivity of a line array in a waveguide is studied for the case of its deflection from the vertical under the effect of underwater currents. The modal composition and the interference pattern of the field radiated by such an array is considered.
Abstract An exact solution is obtained to the problem of sound diffraction by an elastic or impedance sphere located near an impedance or elastic boundary of a halfspace. The problem is solved using the Helmholtz integral equation in which the field of a point source in the halfspace with an...
Abstract In recent years, considerable progress has been made in the development of instrumental methods for general speech quality and intelligibility evaluation on the basis of modeling the auditory perception of speech and measuring the signal-to-noise ratio. Despite certain advantages (fast...
Abstract The diffracted field of an oscillating piezoelectric disk fixed along the edge is calculated with consideration for the spectrum of the disk’s eigenfrequencies and the corresponding oscillation amplitude distribution. The diffraction corrections are calculated as functions of the system...
Abstract Experimental data on the observation of a moving underwater acoustic screen by simplest antenna arrays extended in both vertical and horizontal directions are presented. New signal processing algorithms are proposed.
Abstract According to classical concepts, the relationship between the first two formants is the feature that determines the identification of long vowels in speech. However, the characteristics of vowels may considerably vary depending on the conditions of their production. Thus, the...
Abstract The results of an experimental study of the effect of heat treatment and static deformations on the nonlinear acoustic properties of copper wire samples are presented. The nonlinear properties of wires are studied by measuring the stress-strain curve, the dependence of the velocity of...
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