Title :
A comparison of the underwater acoustic performance of single crystal vs. piezoelectric ceramic based cymbal projectors
Author :
Tressler, James F. ; Howarth, Thomas R. ; Huang, Dehua
Author_Institution :
U.S. Naval Res. Lab., Washington, DC, USA
Abstract :
The underwater acoustic performance of three same-design ´cymbal´ based electro-acoustic projectors are compared. Two of these projectors contain PMN-PT single crystal piezoelectric as the active material while the third utilizes conventional PZT-5H piezoelectric ceramic. The units containing the single crystal material show an improvement in the acoustic source level anywhere from 3 to 15 dB over the frequency band 1-25 kHz. The higher source level is a consequence of the higher drive voltage capability of the single crystal materials. Under appropriate drive conditions, a single crystal cymbal-based projector that is 64 mm thick with an acoustic aperture of 101 mm /spl times/ 101 mm can generate an acoustic source level of at least 175 dB (re: 1 /spl mu/Pa @ 1 m) from /spl sim/3 kHz to > 25 kHz.
Keywords :
oceanographic equipment; piezoceramics; piezoelectric devices; underwater acoustic propagation; 101 mm; 175 dB; 1E3 to 25E3 Hz; 3 kHz; 3 to 15 dB; 64 mm; PMN-PT single crystal piezoelectric; PZT-5H; acoustic aperture; acoustic source level; cymbal based electro-acoustic projectors; cymbal projectors; drive voltage capability; piezoelectric ceramic; single crystal materials; underwater acoustic performance; Acoustic materials; Ceramics; Crystalline materials; Crystals; Dielectric materials; Ferroelectric materials; Piezoelectric materials; Resonance; Resonant frequency; Underwater acoustics;
Conference_Titel :
OCEANS 2003. Proceedings
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-933957-30-0
DOI :
10.1109/OCEANS.2003.1282909
