FIELD: ultrasonic and pulse equipment. SUBSTANCE: invention is related to excitation of elastic surface waves on surface of solid body and is intended for use in devices using these waves. Surface of elastic element 1 with exception of wave forming part 2 is rigidly embraced with screening element 5 made from stiffer material. For radiation of acoustic waves in elastic element 1 in direction of propagation of volumetric wave there is made channel and screening element 5 is rigidly coupled to outer surface of side walls of elastic element 1. EFFECT: increased efficiency of excitation of surface waves. 2 cl, 2 dwg
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