TECHNIQUES FOR GENERATING AUDIO SIGNALS
First Claim
Patent Images
1. A speaker apparatus, comprising:
- a membrane element configured to move along a first direction to generate a first wave with a frequency within a first range of frequencies;
a shutter element; and
a spacer element, coupled to the membrane element and to the shutter element, to separate the membrane element from the shutter element,wherein the shutter element at least partially defines a waveguide, between the membrane element and the shutter element, through which the first wave propagates along the first direction from the membrane element to the shutter element, andwherein the shutter element is configured to operate on the first wave to produce a second wave with a frequency within a second range of frequencies.
6 Assignments
0 Petitions
Accused Products
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. The membrane can be configured to oscillate along a first directional path and at a first frequency effective to generate an ultrasonic acoustic signal. The shutter can be positioned about the membrane and configured to modulate the ultrasonic acoustic signal such that an audio signal can be generated.
-
Citations
20 Claims
-
1. A speaker apparatus, comprising:
-
a membrane element configured to move along a first direction to generate a first wave with a frequency within a first range of frequencies; a shutter element; and a spacer element, coupled to the membrane element and to the shutter element, to separate the membrane element from the shutter element, wherein the shutter element at least partially defines a waveguide, between the membrane element and the shutter element, through which the first wave propagates along the first direction from the membrane element to the shutter element, and wherein the shutter element is configured to operate on the first wave to produce a second wave with a frequency within a second range of frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A speaker apparatus, comprising:
-
a first element configured to receive electrostatic actuation to oscillate at a first frequency to generate a first wave; and a second element configured to move at a second frequency different from the first frequency, wherein the first wave generated by the first element is incident on the second element, and wherein the movement of the second element enables the second element to operate on the first wave to generate a second wave. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A method to manufacture a microelectromechanical system (MEMS) speaker device, the method comprising:
-
forming a membrane element to oscillate at a first frequency to generate a first wave; forming a shutter element to move at a second frequency different from the first frequency; and spacing the shutter element apart from the membrane element to at least partially define a waveguide between the spaced apart shutter and membrane elements, to enable the generated first wave to propagate within the waveguide from the membrane element to the shutter element, wherein movement of the shutter element enables the shutter element to operate on the generated first wave to generate a second wave. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification