А.М. Еnyakov, S.I. Kuznetsov FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russiaenyakov@vniiftri.ru,sergantex@vniiftri.ru Al’manac of Modern Metrology № 3 (27) 2021, pages 85–103 Annotation. The features of the use of a polyethylene terephthalate foil with a thickness of several micrometers for tracking the vibrational displacement in an ultrasonic wave in the frequency range from 1 to 20 MHz … Continue reading Features of the application of sound-transparent metallized foils for the calibration of hydrophones using optical interferometry in free field