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Journal of the Acoustical Society of America

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Dec 1963

Volume 35, Issue 12, pp. 1917-2027

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Deficiencies of the Dynamic Transmission Loss

T. J. Schultz and B. G. Watters

J. Acoust. Soc. Am. Volume 35, Issue 12, pp. 2023-2023 (1963); (1 page)

Online Publication Date: 20 Jul 2005

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This note presents a brief critique of a recently proposed method for the measurement of airborne transmission loss.

Reply to Professor Samuels' Comment on our Paper

F. Kozin and J. L. Bogdanoff

J. Acoust. Soc. Am. Volume 35, Issue 12, pp. 2024-2024 (1963); (1 page)

Online Publication Date: 20 Jul 2005

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Abstract Unavailable

Redefinition of Effective Electromechanical‐Coupling Factor

W. J. Toulis

J. Acoust. Soc. Am. Volume 35, Issue 12, pp. 2024-2025 (1963); (2 pages)

Online Publication Date: 20 Jul 2005

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Although some opposition is being voiced to amending the definition of the effective electromechanical‐coupling factor, no systematic evidence has been found to contradict the proposed revisions at power‐conversion frequencies that are associated with mechanical resonance. On the contrary, earlier evidence has been uncovered that is consistent with the proposed definitive equations. Measurements with an improved piezoceramic specimen show also a much closer agreement between theory and experimental observations.

Duality in the Electromechanical‐Coupling Factor

W. J. Toulis

J. Acoust. Soc. Am. Volume 35, Issue 12, pp. 2025-2025 (1963); (1 page)

Online Publication Date: 20 Jul 2005

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Two electromechanical‐coupling factors are distinguished in order to account for the behavior of transducers at low frequencies, as well as in the vicinity of mechanical resonance. The existence of the two coupling factors requires that the equivalent circuit be reinterpreted but not revised.

Implosions as Sources of Underwater Sound

R. J. Urick

J. Acoust. Soc. Am. Volume 35, Issue 12, pp. 2026-2027 (1963); (2 pages)

Online Publication Date: 20 Jul 2005

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The sound produced by imploding cavities in the form of glass bottles is described quantitatively. Although the efficiency of energy conversion is found to be very low, the energy generated is sufficient to suggest the usefulness of implosions as safe, cheap, and portable sources of underwater sound.
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