超音波音響測深機に関する二三の技術的考察 : 測深能力の図式解法と二周波式音響測深機について(日本航海学会第22回講演会)

抄録

We give in the following the new practical method by virtue of diagram solution for finding out fathomability of echo-sounders which in other way can be calculated and furthermore mention about the future perspectives of echs-sounders being quite probable employing two different frequencies considering about directivity of transducer element and propagation characterristics with respect to frequency.