Ultrasonic transducer for parametric array
First Claim
1. An ultrasonic transducer, comprising:
- a vibrator surface operative to generate one or more ultrasonic compression waves;
a protective cover disposed on one side of the vibrator surface to allow the ultrasonic compression waves to pass therethrough,wherein the protective cover and the vibrator surface are spaced apart a predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover; and
a spacer disposed between the vibrator surface and the protective cover,wherein the predetermined distance corresponds to a thickness of the spacer.
0 Assignments
0 Petitions
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.
-
Citations
12 Claims
-
1. An ultrasonic transducer, comprising:
-
a vibrator surface operative to generate one or more ultrasonic compression waves; a protective cover disposed on one side of the vibrator surface to allow the ultrasonic compression waves to pass therethrough, wherein the protective cover and the vibrator surface are spaced apart a predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover; and a spacer disposed between the vibrator surface and the protective cover, wherein the predetermined distance corresponds to a thickness of the spacer. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A parametric loudspeaker, comprising:
-
at least one audio signal source configured to provide at least one audio signal; a modulator configured to receive a first signal representative of the audio signal and to convert the first signal into ultrasonic frequencies; an ultrasonic transducer having a vibrator surface operative to generate one or more ultrasonic compression waves, and a protective cover disposed on one side of the vibrator surface to allow the ultrasonic compression waves to pass therethrough, wherein the protective cover and the vibrator surface are spaced apart a predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover; and a spacer disposed between the vibrator surface and the protective cover, wherein the predetermined distance corresponds to a thickness of the spacer. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification