Patents
US 9301049 B2: Noise-reducing directional microphone array
- Granted
- 2016-03-29
- Filed
- 2012-08-28 application 13596563
- Type
- Utility · 21 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
In one embodiment, a directional microphone array having (at least) two microphones generates forward and backward cardioid signals from two (e.g., omnidirectional) microphone signals. An adaptation factor is applied to the backward cardioid signal, and the resulting adjusted backward cardioid signal is subtracted from the forward cardioid signal to generate a (first-order) output audio signal corresponding to a beampattern having no nulls for negative values of the adaptation factor. After low-pass filtering, spatial noise suppression can be applied to the output audio signal. Microphone arrays having one (or more) additional microphones can be designed to generate second-(or higher-) order output audio signals.
Source: PVGPATDIS, file of 2026-04-10 (ipg160329.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 |
|---|---|---|---|
| H04R | Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; electric hearing aids; public address systems | H04R1/326 | PVGPATDIS, file of 2026-04-10 |
| G10L | Speech analysis techniques or speech synthesis; speech recognition; speech or voice processing techniques; speech or audio coding or decoding | G10L21/0216 | 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 |
|---|---|---|---|---|---|
| 2012-08-28 | Assignment Assignment of assignor's interest | ELKO, GARY W. signed 2008-08-26 GAENSLER, TOMAS FRITZ signed 2008-08-26 MEYER, JENS M. signed 2008-08-26 | MH ACOUSTICS LLC SUMMIT, NJ | 28861/249 | 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.