1. J.F. Lindberg, "The application of high energy density transducer material to smart systems," Mat. Res. Soc. Symp. Proc. Vol. 459, Materials Research Society, 1997. See also D.F. Jones and J.F. Lindberg, "Recent transduction developments in Canada and the United States," Proceedings of the Institute of Acoustics, 17, Part 3, 15 (1995)

[ 1a] J.L. Butler and A.L. Butler, "Multistatic acoustic source for unmanned underwater vehicles," SBIR Phase II Final Report, Image Acoustics, Inc., Cohasset, MA May 31, 2005, under Contract N66604-02-C-0787, NUWC, Newport RI

2. D.T. Laird and H. Cohen, "Directionality patterns from acoustic radiation from a source on a right cylinder," J. Acoust. Soc. Am. 24, 46 49 ( 1952)

3. J.L. Butler and A.L. Butler, "A Fourier series solution for the radiation impedance of a finite cylinder," J. Acoust. Soc. Am. 104, 2773 2778 ( 1998)

4. J.L. Butler, "Model for a ring transducer with inactive segments," J. Acoust. Soc. Am. 59, 480 482 ( 1976)

5. Channel Industries, Inc., Santa Barbara, CA 93111

6. D.A. Berlincourt, D.R. Curran, and H. Jaffe, Ch. 3, Piezoelectric and Piezomagnetic Materials, Physical Acoustics, Vol. I, Part A, W.P. Mason, Ed. ( Academic Press, N.Y., 1964)

7. J.L. Butler, "Solution of acoustical-radiation problems by boundary collocation," J. Acoust. Soc. Am. 48, 325 336 ( 1970)

8. M.B. Moffet, M.D. Jevnager, S.S. Gilardi, and J.M. Powers, "Biased lead zirconate titanate as a high-power transduction material," J. Acoust. Soc. Am. 105, 2248 2251 ( 1999