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US 12,538,074 B2Granted
System and method for generating an audio signal
AssigneeSonicedge Ltd.
InventorsMordehai Margalit, Jørgen Kragh Jakobsen
Life of this patent
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Abstract
Techniques described herein generally relate to generating an audio signal with a speaker. In some examples, a speaker device is described that includes a membrane and a shutter and driver device is configured to receive an audio signal, modulate it and generate electric signals to operate the speaker and generate an acoustic audio signal.
Claims19
A driver device for operating a speaker comprising:
- a power source;
- two or more voltage drivers each including a MEMS driver configured to receive voltage from the power source;
- a controller;
- wherein the speaker includes at least a membrane and a shutter, and
- wherein the controller is configured to receive a digital audio signal and operate the two or more voltage drivers such that at least one of the voltage drivers drives the membrane with a pulsed electrical signal comprising at least two or more voltage levels and another of the voltage drivers drives the shutter with a pulsed electrical signal comprising at least two or more voltage levels to generate an audio signal from the speaker.
2 more elements
A driver device and speaker structure comprising:
- a speaker comprising:
- at least one membrane positioned in a first plane and configured to oscillate along a first directional path and at a first frequency effective to generate an ultrasonic acoustic signal;
- and
- a shutter positioned in a second plane that is substantially separated from the first plane;
- and
- a driver device comprising:
- a power source;
- first and second MEMS voltage drivers configured to receive voltage from the power source;
- a controller;
- wherein the controller is configured to receive an input audio signal and 1) operate the first MEMS voltage driver with a pulsed electrical signal comprising at least two or more voltage levels to generate a modulated audio signal to operate the at least one membrane and 2) operate the second MEMS voltage driver with a pulsed electrical signal comprising at least two or more voltage levels to generate an ultrasonic modulated signal and operate the shutter at the modulation frequency to demodulate the ultrasonic modulated signal and generate an acoustic audio signal.
7 more elements
A driver device for operating a speaker, the speaker having a membrane and a shutter, the driver device comprising:
- a controller;
- a charge pump configured to generate a high voltage signal;
- a first MEMS driver and a second MEMS driver configured to modulate the high voltage signal,
- wherein the controller is configured to receive a digital sound data stream and an operating voltage and operate the first MEMS driver to generate a pulsed electrical signal with at least two voltage levels to drive the membrane and operate the second MEMS driver to generate a pulsed electrical signal with at least two voltage levels to drive the shutter to generate an audio signal from the speaker.
1 more element
Dependencies are inferred from the claim text.