References
- Toulis , W. J. Flexural- Extensional Transducer . U.S. Patent 3,274,537 . 1963 .
- Toulis , W. J. Flexural-Extensional Transducer . U. S. Patent 3,277,433 . 1963 .
- Oswin , J. R. and Turner , A. 1984 . Proc. Inst of Acoustics , 6 : 94 (pt 3)
- Smith , B. V. 1990 . Proc Inst of Acoustics , 12 : 107 (pt 4)
- Bauer , B. B. 1953 . J. Acoust. Soc. Am. , 25 ( 5 ) : 837
- Francis , D. T. I. and Oswin , J. R. 1995 . Proc Inst of Acoustics. , 17 : 73 (pt 3)
- Oswin , J. R. 1995 . Proc Inst of Acoustics. , 17 : 210 (pt 3)
- Butler , J. L. , Rolt , K. D. and Tito , F. A. 1994 . J. Acoust. Soc. Am. , 96 ( 3 ) : 1914
- Piezoelectric Materials handbook: data for Designers , Vemitron . Undated
- Berlincourt , D. 1971 . Ultrasonic Transducer Materials , Edited by: Mattiat , O. E. 63 – 124 . New York : Plenum Press .
- Jones , D. F. and Lindberg , J. F. 1995 . Proc Inst of Acoustics. , 17 : 15 (pt 3)
- Merchant , H. C. Underwater Transducer Apparatus . U. S. Patent 3,258,738 . 1966 .