Wideband, derivative-matched, continuous aperture acoustic trans

Details Wideband, derivative-matched, continuous aperture acoustic trans Wideband, derivative-matched, continuous aperture acoustic trans

1991-03-29

1993-08-17

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367119, 367124, 367153, 367157, 310334, 310337, G01S 1500, H04R 1700

Patent

active

052375420

ABSTRACT:
A wideband, derivative-matched, continuous aperture acoustic transducer includes a first sensor area having a predetermined spatial shading and a second sensor area having a spatial shading which is the spatial derivative of the spatial shading of the first area; the first and second spatial shaded areas are superimposed and co-extensive along the sensing axis.

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Henderson, T. L., "Matched Beam Theory of Unambiguous Broadband . . . ", Journal of Acoust. Soc. of Am., 78(2) Aug. 1985.
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Lacker et al., "Wideband Monopulse . . . ", IEEE Journal of Oceanic Engineering, vol. 15, No. 1, Jan. 1990.
Loutzenheiser et al., "Thickness/Twist Vibrations", Journal of Acoustic Soc. of Am., vol. 41, No. 4, Part 2, Aug. 1966.
Tomikawa et al., "Wide Band Ultrasonic Transducer", Japanese Journal of Appl. Physics, vol. 23, 1984, Supp. 23-1, pp. 113-115.
Busch-Vishniac et al., "A New Approach to Transducer Design", Journal Acoust. Soc. of Am. 76(6), Dec. 1984.
Hughes, "Advanced Underwater Sensors", Sea Technology, Aug. 1990.

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