Multielement microphone
AssigneeMotorola Mobility LLC
InventorRobert Zurek
Life of this patent
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Abstract
An improved microphone assembly (128) is provided for porting two microphones (240, 242) of an opposing pair used for beam forming through a single symmetric porting structure (244). The microphone assembly (128) includes a first microphone capsule (240), a second microphone capsule (242) and a porting structure (244). The porting structure (244) encloses the first and second microphone capsules (240, 242) therein and has a first port (251) formed in a first wall (246) thereof and a second port (252) formed in a second wall (248) thereof opposite to the first wall (246), where the first and second microphone capsules (240, 242) share the first port (251).
Claims20
A microphone assembly comprising:
- a first microphone capsule;
- a second microphone capsule;
- and
- a porting structure for enclosing the first microphone capsule and the second microphone capsule, the porting structure having a first port formed in a first wall of the porting structure and a second port formed in a second wall of the porting structure opposite to the first wall, wherein the first microphone capsule and the second microphone capsule share the first port.
The microphone assembly of claim I wherein the porting structure is a symmetric porting structure having the second microphone capsule formed symmetrically with the first microphone capsule and wherein the first microphone capsule and the second microphone capsule share the second port.
A method for manufacturing a first order directional semiconductor microphone in a semiconductor die comprising the steps of:
- forming a gradient microphone in the semiconductor die, the gradient microphone having a rear port;
- and
- forming acoustic resistance at the rear port.
A microphone array comprising:
- a semiconductor die;
- and
- a first microelectro-mechanical system (MEMS) microphone structure defining a directional microphone element formed in the semiconductor die, the first MEMS microphone structure including a first acoustic labyrinth.
An electronic device comprising:
- a user interface including a microphone assembly having a first microphone capsule, a second microphone capsule, and a porting structure for enclosing the first microphone capsule and the second microphone capsule, the porting structure having a first port formed in a first wall of the porting structure and a second port formed in a second wall of the porting structure opposite to the first wall, wherein the first microphone capsule and the second microphone capsule share the first port;
- and
- a controller coupled to the user interface for receiving information therefrom and for providing signals to the user interface for operation of the microphone assembly in response thereto.
Dependencies are inferred from the claim text.