Determination of effective hydrophone sizes from 1 to 50 MHz according to IEC 62127-3:2022 using short pulse excitation

An existing setup for hydrophone directivity measurements and effective size determination was revised to comply with the recent requirements of IEC 62127-3 Ed.2. Short pulse excitation is applied to efficiently characterize several different hydrophones in broad frequency ranges and with high frequency resolution. Effective size results agree with the more restricted data obtained earlier. Proposals for future improvement of the standard are concluded from the investigations performed.