Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz (IEC 62127-3:2007 + A1:2013); German version EN 62127-3:2007 + A1:2013— 23 стр.
Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz (IEC 62127-1:2007); German version EN 62127-1:2007— 84 стр.