P.V. Bazylev, I.Ya. Krumgolts, V.A. Lugovoi Al’manac of Modern Metrology № 1 (17) 2019, pages 79–86 A standard for reproducing the unit of attenuation coefficient of longitudinal ultrasonic waves in solid media based on contactless capacitive methods of generating and receiving ultrasonic oscillations using echo-pulse and resonant measurement methods, which is part of the State … Continue reading Reference device for reproducing the unit of attenuation coefficient of longitudinal ultrasonic waves in solid media as part of GET 189-2014