Investigation of a radially vibrating, oil filled cylindrical ceramic transducer with a variable internal impedance and devoid of all forms of pressure release

摘要

A radially vibrating, oil filled, cylindrical ceramic transducer devoidof all forms of pressure release provides a means of transmitting soundat unlimited depths. A study was made of the admittance characteristicsin the vicinity of resonance of a transducer of this type, which was constructedwith a variable acoustic impedance in the oil filled interior. Theresults were compared with theoretical computations, which proved helpfulin analyzing and interpreting the resonances of the transducer. Additionalmeasurements were made on the transducer and were utilized in thecomputation of electroacoustic efficiency at the major resonances. The writer wishes to express his appreciation for the assistance andencouragement given him in this investigation by Mr. Joe Martin of theBendix- Pacific Division of North Hollywood, California.