H04R 2227/009
Signal processing in [pa] systems to enhance the speech intelligibility
Official title: Signal processing in [PA] systems to enhance the speech intelligibility
H04R2227/009 (Signal processing in [pa] systems to enhance the speech intelligibility) appears on 166 US grants and 186 published applications in this corpus.
Search patents in H04R- Granted patents
- 166
- Published applications
- 186
- Assignees
- 105
- Inventors
- 325
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 4 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 2 | 2 |
| 2011 | 0 | 3 |
| 2012 | 4 | 5 |
| 2013 | 1 | 4 |
| 2014 | 4 | 8 |
| 2015 | 7 | 9 |
| 2016 | 12 | 10 |
| 2017 | 17 | 12 |
| 2018 | 10 | 14 |
| 2019 | 13 | 18 |
| 2020 | 16 | 15 |
| 2021 | 15 | 13 |
| 2022 | 15 | 14 |
| 2023 | 16 | 19 |
| 2024 | 11 | 9 |
| 2025 | 11 | 18 |
| 2026 | 8 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Speakerphone with room acoustics characterization and related methods6 Oct 2026US 12,756,775 B2
- Systems and methods for acoustic echo cancellation for audio playback devices15 Sep 2026US 12,738,290 B2Sonos, Inc.
- Linear filtering for noise-suppressed speech detection12 May 2026US 12,626,717 B2Sonos, Inc.
- Detecting active speakers using head detection14 Apr 2026US 12,604,125 B2Cisco Technology, Inc.
- Speakerphone and server device for environment acoustics determination and related methods3 Mar 2026US 12,568,175 B2
- Distributed algorithm for automixing speech over wireless networks23 Jul 2026US 2026/0212719 A1Shure Acquisition Holdings, Inc.
- Hearing-assist systems and methods for audio quality enhancements in performance venues23 Jul 2026US 2026/0214385 A1The Epstein Hear Us Now Foundation
- Listening sound obtaining method and listening sound obtaining apparatus2 Jul 2026US 2026/0185869 A1Yamaha Corporation
- Optimization of audio system characteristics in room environments18 Dec 2025US 2025/0386160 A1Qsc, LLC
- Audio device with dynamically responsive volume27 Nov 2025US 2025/0364964 A1Lutron Technology Company LLC
Most cited
By later US patents
- Characterizing environment using ultrasound pilot tones371US 9,319,816 B1Amazon Technologies, Inc. · 2016
- Unified communications system and method133US 9,723,130 B22017
- Voice intelligibility enhancement system89US 6,993,480 B1SRS Labs, Inc. · 2006
- Audio output control84US 10,157,042 B1Amazon Technologies, Inc. · 2018
- Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter59US 8,199,927 B1ClearOnce Communications, Inc. · 2012