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THIN CYLINDRICAL CERAMIC TRANSDUCERS
Techncial rept. no. 6
RHODE ISLAND UNIV KINGSTON
Pagination or Media Count:
Free-flooded thin cylindrical ceramic rings have distinct advantages in deep water transducer applications. Their actual behavior in different resonance modes is not well known. To study this problem an extensive review of the existing theories on the finite cylinder has been made, the advantages and disadvantages of each pointed out. Moreover, for model rings are used in the laboratory to study the problem experimentally. Ring pairs of 1.25 in and 1 in diameter are identical except for heights which range from 1.5 in to 0.5 in. The frequency range is from 10 kc to 200 kc. The pulse technique is used and the results include response characteristics, impedance curves, radiation patterns and power output characteristics for both the free-flooded and air- backed arrangements. The same ring is used for flooded and pressure-relieved experiments so that there are no extraneous differences in the two cases. This is accomplished by means of a very thin membrane cemented to each end of the ring. The compliance of the membrane is so large that mechanical effects on the ring itself are negligible.
APPROVED FOR PUBLIC RELEASE