H04R 25/45
Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
Official title: {Prevention of acoustic reaction, i.e. acoustic oscillatory feedback}
H04R25/45 (Prevention of acoustic reaction, i.e. acoustic oscillatory feedback) appears on 1,008 US grants and 1,065 published applications in this corpus.
Search patents in H04R- Granted patents
- 1,008
- Published applications
- 1,065
- Assignees
- 269
- Inventors
- 1,316
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 20 | 0 |
| 2001 | 14 | 6 |
| 2002 | 23 | 17 |
| 2003 | 13 | 17 |
| 2004 | 14 | 33 |
| 2005 | 12 | 35 |
| 2006 | 20 | 20 |
| 2007 | 20 | 32 |
| 2008 | 19 | 40 |
| 2009 | 14 | 35 |
| 2010 | 22 | 55 |
| 2011 | 24 | 39 |
| 2012 | 42 | 21 |
| 2013 | 54 | 44 |
| 2014 | 51 | 46 |
| 2015 | 53 | 52 |
| 2016 | 35 | 42 |
| 2017 | 42 | 48 |
| 2018 | 53 | 61 |
| 2019 | 55 | 50 |
| 2020 | 54 | 52 |
| 2021 | 42 | 57 |
| 2022 | 62 | 54 |
| 2023 | 51 | 64 |
| 2024 | 45 | 44 |
| 2025 | 42 | 55 |
| 2026 | 30 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Speech boost for ear-worn device15 Sep 2026US 12,739,574 B2Fortell Research Inc.
- Hearing instrument and associated binaural hearing system15 Sep 2026US 12,739,579 B2Sivantos Pte.Ltd
- User interface control using vibration suppression18 Aug 2026US 12,713,186 B2Starkey Laboratories, Inc.
- Electronic device for outputting sound and operating method thereof4 Aug 2026US 12,700,417 B2Samsung Electronics Co., Ltd.
- Simultaneous transmit signals and receive signals4 Aug 2026US 12,701,032 B2Rtx Bbn Technologies, Inc.
- Feedback Canceller in a Hearing Assistance System8 Oct 2026US 2026/0313299 A1Legato Audio, Inc.
- Feedback cancellation divergence prevention24 Sep 2026US 2026/0290303 A1Starkey Laboratories, Inc.
- Hearing aid comprising a combined feedback and active noise cancellation system24 Sep 2026US 2026/0292410 A1Oticon A/S
- Method to mitigate the effect of spatial artifacts in an acoustic signal of a binaural hearing system24 Sep 2026US 2026/0292411 A1Sonova AG
- A hearing aid system and a method of operating a hearing aid system10 Sep 2026US 2026/0270627 A1Widex A/S
Most cited
By later US patents
- Wireless open ear canal earpiece473US 6,021,207 AResound Corporation · 2000
- Ear microphone340US 4,588,867 A1986
- Adaptive, programmable signal processing and filtering for hearing aids325US 5,027,410 AWisconsin Alumni Research Foundation · 1991
- Direct tympanic membrane excitation via vibrationally conductive assembly296US 6,137,889 AInsonus Medical, Inc. · 2000
- Auditory prosthesis, noise suppression apparatus and feedback suppression apparatus having focused adaptive filtering254US 5,402,496 AMinnesota Mining and Manufacturing Company · 1995