Abstract: The invention relates to hydroacoustic domain, notably to methods and devices of active location. The method of controlling intercarrier frequency wave efficiency with parametric radiating antenna is based on placing electroacoustic transducer with piezoelement with given resonance frequency (f1+f2)/2=f0 and pass band corresponding to intercarrier frequency wave diapason in locating area, feeding electric signals from radiating tract output to electroacoustic transducer piezoelement, forming in locating area spatial area of collinear distribution and non-linear interaction of intense ultrasound pimp waves, generation of intercarrier frequency wave with cyclic frequency ?=2?|f1?f2|.

Abstract: The invention relates to hydroacoustic equipment and can be used in constructing hydroacoustic systems. Multifrequency sonar side viewer comprising display unit, control unit, n-input adder, connected in series radio-frequency pulse generator, switch, multielement transceiving interference antenna, differs because of antenna aperture is made as cylinder-shaped bay, convex towards echo search, with radius of curvature R, that has generatrix l in azimuth plane and that is way longer than a chord, that draws together uttermost symmetric, relatively to the acoustic axe, points of arc with L length. The invention expands operational capabilities of sonar side viewer, reducing dead zone and increasing dimension of explored bottom surface swath in echo search direction, due to the using of non-linear self-action soundwaves effect.

Abstract: The construction has two piezoelectric transducers with radiating apertures shaped as sections of spherical surface one is concave, the second is convex, of sufficient wave sizes D/?>10, where D is the diameter of the aperture, ? is the wavelength of the emitted pump signal). For each piezoelectric transducers radii of curvature R0, focal lengths F0 and focal spots radii r0 with a wave length of radiated signal are the same and are related by r0×R0=0.61×?×F0. Piezoelectric transducers with radiating apertures shaped as sections of spherical surface are provided with shielding elements, hydro-, electric- and noise insulation and one of them with convex aperture is made with an open axial hole with radius r=(2÷3)×r0 in the central part of the convex spherical surface of the aperture.

Abstract: The invention relates to hydroacoustic equipment and can be used in constructing hydroacoustic systems. Multifrequency sonar side viewer comprising display unit, control unit, n-input adder, connected in series radio-frequency pulse generator, switch, multielement transceiving interference antenna, differs because of antenna aperture is made as cylinder-shaped bay, convex towards echo search, with radius of curvature R, that has generatrix l in azimuth plane and that is way longer than a chord, that draws together uttermost symmetric, relatively to the acoustic axe, points of arc with L length. The invention expands operational capabilities of sonar side viewer, reducing dead zone and increasing dimension of explored bottom surface swath in echo search direction, due to the using of non-linear self-action soundwaves effect.

Abstract: The construction has two piezoelectric transducers with radiating apertures shaped as sections of spherical surface one is concave, the second is convex, of sufficient wave sizes D/?>10, where D is the diameter of the aperture, ? is the wavelength of the emitted pump signal). For each piezoelectric transducers radii of curvature R0, focal lengths F0 and focal spots radii r0 with a wave length of radiated signal are the same and are related by r0×R0=0.61×?×F0. Piezoelectric transducers with radiating apertures shaped as sections of spherical surface are provided with shielding elements, hydro-, electric- and noise insulation and one of them with convex aperture is made with an open axial hole with radius r=(2÷3)×r0 in the central part of the convex spherical surface of the aperture.