Ultrasonic transducer for parametric array
First Claim
1. An electro-acoustic transducer, comprising:
- a vibrator film;
a plurality of plates;
at least one resilient member operative to urge the respective plates against the vibrator film;
a retainer having a plurality of apertures formed therethrough; and
an electrical conductor operative to provide a drive voltage to the vibrator film,wherein the vibrator film is disposed between the plurality of plates and the retainer,wherein each of the plurality of plates is substantially in registration with a respective one of the apertures formed through the retainer, andwherein the vibrator film is operative to vibrate in response to the drive voltage, thereby generating a series of compression waves at sonic or ultrasonic frequencies.
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Accused Products
Abstract
An ultrasonic transducer having a reduced cost of manufacture. The ultrasonic transducer includes a first insulative retaining layer, a second insulative retaining layer, and a vibrator film layer sandwiched between the first and second retaining layers. The first retaining layer includes a first plurality of apertures formed therethrough, and the second retaining layer includes a second plurality of apertures formed therethrough, in which the second apertures are substantially in registration with the first apertures. The ultrasonic transducer further includes a first cover portion having a plurality of spring/backplate assemblies connected thereto, and a second cover portion. The combination of the first retaining layer, the vibrator film layer, and the second retaining layer is sandwiched between the first and second cover portions of the ultrasonic transducer. The laminated construction of the ultrasonic transducer allows the formation of an array of ultrasonic film transducers using a single piece of ultrasonic vibrator film.
56 Citations
19 Claims
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1. An electro-acoustic transducer, comprising:
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a vibrator film; a plurality of plates; at least one resilient member operative to urge the respective plates against the vibrator film; a retainer having a plurality of apertures formed therethrough; and an electrical conductor operative to provide a drive voltage to the vibrator film, wherein the vibrator film is disposed between the plurality of plates and the retainer, wherein each of the plurality of plates is substantially in registration with a respective one of the apertures formed through the retainer, and wherein the vibrator film is operative to vibrate in response to the drive voltage, thereby generating a series of compression waves at sonic or ultrasonic frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An electro-acoustic transducer, comprising:
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a vibrator film; a plurality of plates; at least on resilient member operative to urge the respective plates against the vibrator film; a retainer disposed between the vibrator film and the plurality of plates, the retainer having a plurality of apertures formed therethrough; and an electrical conductor operative to provide a drive voltage to the vibrator film, wherein the plurality of plates are disposed within the plurality of apertures formed through the retainer, and wherein the vibrator film is operative to vibrate in response to the drive voltage, thereby generating a series of compression waves at sonic or ultrasonic frequencies.
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Specification