Patent ID: 11863925
Assignee: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A microphone assembly comprising:
a substrate that defines a first port that extends completely therethrough;
a printed circuit board (PCB) having a first side and a second side, the PCB defining a sound opening that extends completely through the first side and the second side;
a micro-electro-mechanical systems (MEMS) transducer positioned on a first side of the substrate and being positioned directly above the first port and the sound opening;
a first lid defining a second port and covering the MEMS transducer and the first port, and the first port being axially displaced from the second port, the first lid and the substrate define a front volume of air that surrounds the MEMS transducer; and
a second lid being positioned on the second side of the PCB, the second lid defining a cavity;
wherein the cavity of the second lid, the sound opening of the PCB, and the first port of the substrate define a back volume of air that is greater than the front volume of air to increase a signal-to-noise-ratio (SNR) and to increase an overall frequency response for the microphone assembly,
a gasket defining a sound hole that extends completely therethrough to attach the first lid to a housing defining a sound aperture;
wherein the gasket includes a first side that is coupled to the housing and the sound hole of the gasket is axially aligned with the sound aperture of the housing;
wherein the sound hole of the gasket is axially offset from the sound opening of the PCB and from the cavity of the second lid.