article · The Journal of the Acoustical Society of America · 1982

Experimental constant beamwidth transducer

L. D. Luker, A. L. Van Buren, Michael D. Jevnager, A. C. Tims

Cited by 13Abstract and details only

Abstract

The theory of a broadband constant beamwidth transducer (CBT) which is based on Legendre function shading of a spherical cap was described in a previous report [P. H. Rogers and A. L. Van Buren, J. Acoust. Soc. Am. 64, 38–43 (1968)]. Theoretical calculations showed the CBT to have uniform acoustic loading, extremely low sidelobes, virtually no nearfield, an essentially constant beam pattern for all frequencies above a certain cutoff frequency, and a flat transmitting current response over a broad band for piezoelectric drive. In this paper we present experimental results obtained for a prototype CBT based on fifth-order Legendre function shading. The transducer is a spherical cap with a diameter of 30.5 cm and a total cap angle of 50 degrees. The spherical cap is an aluminum plate in which 849 lead zirconate-titanate disks, 0.635 cm in diameter and 0.318 cm thick, are arranged in 16 circular bands with each disk isolated from the plate by corprene. Measurements on the CBT showed it to possess very low sidelobes and a nearly constant beamwidth over the frequency range from 20 to 140 kHz and for ambient pressures up to 3.4 MPa.

Cite this paper

APA 7

Luker, L. D., Van Buren, A. L., Jevnager, M. D., & Tims, A. C. (1982). Experimental constant beamwidth transducer. The Journal of the Acoustical Society of America, 71(S1), S109. https://doi.org/10.1121/1.2019202

MLA 9

Luker, L. D., et al. “Experimental constant beamwidth transducer.” The Journal of the Acoustical Society of America, vol. 71, no. S1, 1982, p. S109, https://doi.org/10.1121/1.2019202.

Chicago

Luker, L. D., A. L. Van Buren, Michael D. Jevnager, and A. C. Tims. 1982. “Experimental constant beamwidth transducer.” The Journal of the Acoustical Society of America 71 (S1): S109. https://doi.org/10.1121/1.2019202.

Harvard

Luker, L.D. et al. (1982) ‘Experimental constant beamwidth transducer’, The Journal of the Acoustical Society of America, 71(S1), p. S109. Available at: https://doi.org/10.1121/1.2019202.

BibTeX

@article{luker1982experimental,
  title = {{Experimental constant beamwidth transducer}},
  author = {Luker, L. D. and Van Buren, A. L. and Jevnager, Michael D. and Tims, A. C.},
  journal = {The Journal of the Acoustical Society of America},
  volume = {71},
  number = {S1},
  pages = {S109},
  year = {1982},
  doi = {10.1121/1.2019202}
}

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