Patents
US 9202475 B2: Noise-reducing directional microphone ARRAYOCO
- Granted
- 2015-12-01
- Filed
- 2012-10-15 application 13697585
- Type
- Utility · 44 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
In one embodiment, a directional microphone array having (at least) two microphones mounted on opposite sides of a device generates forward and backward base signals from two (e.g., omnidirectional) microphone signals using diffraction filters and equalization filters. Each diffraction filter implements a (possibly different) transfer function representing the response of an audio signal traveling from a corresponding microphone around the device to the other microphone. A scale factor is applied to, for example, the backward base signal, and the resulting scaled backward base signal is combined with (e.g., subtracted from) the forward base signal to generate a first-order differential audio signal. After low-pass filtering, spatial noise suppression can be applied to the first-order differential audio signal. Microphone arrays having one (or more) additional microphones can be designed to generate second- (or higher-) order differential audio signals.
Source: PVGPATDIS, file of 2026-04-10 (ipg151201.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| MH Acoustics, LLC 19 patents | US company or organization | Summit, NJ | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gary W. Elko | Summit, NJ | 26 | PVGPATDIS, file of 2026-04-10 | |
| Jens M. Meyer | Saint Albans, VT | 17 | PVGPATDIS, file of 2026-04-10 | |
| Tomas F. Gaensler | Hackettstown, NJ | 11 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G10L | Speech analysis techniques or speech synthesis; speech recognition; speech or voice processing techniques; speech or audio coding or decoding | G10L21/0208 | PVGPATDIS, file of 2026-04-10 |
| G10K | Sound-producing devices; methods or devices for protecting against, or for damping, noise or other acoustic waves in general; acoustics not otherwise provided for | G10K11/16 | PVGPATDIS, file of 2026-04-10 |
| H04R | Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; electric hearing aids; public address systems | H04R3/005 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2013-11-15 | Assignment Assignment of assignor's interest | ELKO, GARY W. signed 2013-08-09 GAENSLER, TOMAS F. signed 2013-08-09 MEYER, JENS M. signed 2013-08-09 | MH ACOUSTICS LLC SUMMIT, NJ | 31608/383 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.