US 2017/0289701 A1Published application

Ultrasonic transducer

OwnerFrank Joseph Pompeiinventor

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Abstract

Ultrasonic transducers that are capable of generating increased levels of ultrasound, as well as receiving ultrasonic waves with increased sensitivity. The ultrasonic transducers include a back cover, a protective front cover, a backplate, and a vibrator film layer disposed between the backplate and the protective front cover. The backplate includes a plurality of grooves formed on a surface thereof facing the vibrator film layer. Each groove includes upper edges having cross-sectional contours that gradually tend toward the deepest part of the groove to allow a larger area of the backplate to be closer to the vibrator film layer, thereby increasing the resulting electric field, and, consequently, increasing the output power and sensitivity of the ultrasonic transducer.

Claims20

Dependent claims

A parametric audio system for generating at least one airborne audio beam, comprising:

at least one audio signal source configured to provide at least one audio signal;
at least one signal conditioner configured for receiving the at least one audio signal and for nonlinearly processing the audio signal to provide at least one pre-distorted signal;
a modulator configured to receive the pre-distorted signal and to convert the pre-distorted signal into ultrasonic frequencies;
and
at least one ultrasonic transducer configured to receive the converted signal and to project the converted signal through the air along a selected path, thereby inverting distortion in the projected signal and regenerating the audio signal along at least a portion of the selected path with reduced net distortion,
wherein the at least one ultrasonic transducer includes:
a vibrator film layer;
and
a backplate disposed against the vibrator film layer,
wherein the backplate includes a plurality of depressions formed on a surface thereof facing the vibrator film layer, and
wherein at least some of the plurality of depressions include opposing sides with upper surfaces having cross-sectional contours with substantially equal varying slopes to allow an increased area of the surface of the backplate to be near the vibrator film layer.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/623,780Filed 15 Jun 2017
Priority: 11 May 2015
Published: 5 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04R 19/02
Electrostatic transducers: loudspeakers
B06B 1/0292
Making use of electrical energy: electrostatic transducers, e.g. electret-type
H04B 11/00
Transmission systems employing ultrasonic, sonic or infrasonic waves
H04R 19/04
Electrostatic transducers: microphones

Family

Application14/442,078Division · filed 11 May 2015
Application15/623,780Division
US 10,182,297 B2Related patent
US 2016/0021466 A1Published application
US 9,686,618 B2Related patent
US 2017/0289701 A1This patent

From the US filing history. Foreign family members aren’t listed.

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