Vented Microphone Module

• US 20130177192A1
• Filed: 10/23/2012
• Published: 07/11/2013
• Est. Priority Date: 10/25/2011
• Status: Abandoned Application

• Current Assignee: Knowles Electronics Llc (Knowles Corporation)
• Original Assignee: Knowles Electronics Llc (Knowles Corporation)
• Inventors: Abry, Michael J., Manley, Matthew
• Application Number:
  US13/658,337
• Publication Number:
  US 20130177192A1
• Time in Patent Office: Days
• US Class Current: 381/369
• CPC Class Codes: H04R 1/08 Mouthpieces; Microphones; Attachments therefor
• CPC Class Codes: H04R 1/083 Special constructions of mouthpieces
• CPC Class Codes: H04R 1/28 Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means combinations of transducers with horns, i.e. front-loaded horns H04R1/30
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Abstract

A microphone module includes an outer housing and a microphone apparatus. The outer housing includes port that extends through the outer housing. The microphone apparatus is disposed in the outer housing and defines an extended back volume with the outer housing. The microphone apparatus includes a microphone apparatus housing, an acoustic sensing element, a front volume, and a back volume. The acoustic sensing element is disposed within the microphone apparatus housing. An opening in the microphone apparatus housing allows the extended back volume to communicate with the back volume.

Claims

1. A microphone module, comprising:

an outer housing and a port extending through the outer housing;

a microphone apparatus, the microphone apparatus disposed in the outer housing and defining an extended back volume with the outer housing, the microphone apparatus comprising;

a microphone apparatus housing;

an acoustic sensing element disposed within the microphone apparatus housing;

a front volume communicating with the port of the microphone module, the front volume being defined by a first side of the acoustic sensing element and the microphone apparatus housing;

a back volume defined by a second side of the acoustic sensing element and the microphone apparatus housing;

an opening in the microphone apparatus housing, the opening allowing the extended back volume to communicate with the back volume.

2. The microphone module of claim 1 wherein the acoustic sensing element comprises a diaphragm and a charged plate.

3. The microphone module of claim 1 wherein the rear volume and the extended volume are acoustically isolated from the port.

4. The microphone module of claim 1 wherein the opening of the microphone apparatus extends across the entirety of the back volume.