Nominal performance measures for two 710-kHz transducers
Original version
This report is not to be cited without prior reference to the authorAbstract
Two new transducers have been designed by SIMRAD for the EK500 echo
sounding system. The nominal operating frequency is 710 kHz. Each
transducer is composed of a single, circular, active element, with diameter
of 25 or 50 mm. The nominal equivalent beam angle and directivity index
are computed for each of these. It is argued that the computed values are
more appropriate for ordinary applications in which a transducer is mounted
on a large supporting surface, for example, a vessel hull, than are control
measurements of the same transducer when minimally mounted or supported.