Underwater acoustics - Hydrophones - Calibration of hydrophones - Part 1: Procedures for free-field calibration of hydrophones (IEC 60565-1:2020); German version EN IEC 60565-1:2020— 97 стр.
Underwater acoustics - Hydrophones - Calibration of hydrophones - Part 1: Procedures for free-field calibration (IEC 87/708/CDV:2019); German and English version prEN IEC 60565-1:2019