Browsing by Keywords "Acoustic transducers"
Now showing items 1-7 of 7
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A backscattering formula for acoustic transducers
(A I P Publishing, 1980-06)A backscattering formula for a single transducer geometry is derived. It expresses the output voltage of the transducer in terms of the angular spectra of scalar and vector acoustic potentials on a plane. The formulation ... -
Microfabricated ultrasonic transducers: towards robust models and immersion devices
(IEEE, 1996-11)The successful fabrication of ultrasonic immersion transducers is reported. Transducers are observed to operate from 1 MHz to 20 MHz in water, with the frequency range limited by electronics, not the transducers. Transmission ... -
Micromachinable leaky wave air transducers
(IEEE, 1997-11)In this paper, ultrasonic air transducers which use the lowest order antisymmetric (A/sub 0/) mode Lamb waves in a thin plate as a means of efficient coupling of ultrasonic energy to air are discussed. For a silicon plate ... -
A new directional acoustic lens: V-groove lens
(IEEE, 1993)A new directional acoustic lens is introduced. The geometry is very similar to the line-focus lens except the lens cavity, which is shaped as a groove with flat-bottom V cross section. The slanted planar edges of the groove ... -
A synthetic aperture imaging system using surface wave modes
(IEEE, 1995)A synthetic aperture acoustic imaging system with a novel inversion algorithm is described. Data is obtained by using a transducer insonifying the sample surface at a critical angle which is excited by a short electrical ... -
Use of a conical axicon as a surface acoustic wave focusing device
(IEEE, 1987-01)Ultrasonic axicons generate waves which focus on a line. They are used in various imaging applications as hulk wave focusing devices with a very long depth of focus. A new type of conical axicon is introduced. It consists ... -
A wideband and a Wide-Beamwidth acoustic transducer design for underwater acoustic communications
(IEEE, 2007-05)This paper is concerned with the design of an efficient, wideband and a wide-beamwidth resonant acoustic transducer for high frequency use. The general transducer structure which has two back-to-back quarter wave thick 1-3 ...