Audio device with conduit connector
US-2019306606-A1 · Oct 3, 2019 · US
Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
Prevention of acoustic reaction, i.e. acoustic oscillatory feedback · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R25/45 |
| Official title | {Prevention of acoustic reaction, i.e. acoustic oscillatory feedback} |
| Display label | Prevention of acoustic reaction, i.e. acoustic oscillatory feedback |
| Total patents | 145 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 16 |
| 2016 | 16 |
| 2017 | 13 |
| 2018 | 14 |
| 2019 | 9 |
| 2020 | 7 |
| 2021 | 23 |
| 2022 | 18 |
| 2023 | 17 |
| 2024 | 9 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hearing device comprising a beamformer filtering unit
US-10165373-B2 · Dec 25, 2018 · US
Hearing aid configured to be operating in a communication system
US-10149075-B2 · Dec 4, 2018 · US
Hearing aid device and method for feedback reduction
US-10136228-B2 · Nov 20, 2018 · US
Wearable acoustic device with microphone
US-10123137-B2 · Nov 6, 2018 · US
Tonality-driven feedback canceler adaptation
US-10097930-B2 · Oct 9, 2018 · US
Method for operating a hearing device and hearing device
US-2018234775-A1 · Aug 16, 2018 · US
Eartip that conforms to a user's ear canal
US-10045107-B2 · Aug 7, 2018 · US
Methods and apparatus for reducing ambient noise based on annoyance perception and modeling for hearing-impaired listeners
US-10034102-B2 · Jul 24, 2018 · US
Fitting a bilateral hearing prosthesis system
US-10015605-B2 · Jul 3, 2018 · US
Method, device, and system for suppressing feedback in hearing aid devices with adaptive split-band frequency
US-9980056-B2 · May 22, 2018 · US
Feedback estimation based on deterministic sequences
US-9973863-B2 · May 15, 2018 · US
Hearing aid device and method for operating the hearing aid device with a communication device
US-9942670-B2 · Apr 10, 2018 · US
Cochlea hearing aid fixed on eardrum
US-9901736-B2 · Feb 27, 2018 · US
Hearing aid device with positioning guide and hearing aid device system
US-9860653-B2 · Jan 2, 2018 · US
Wearable acoustic device with microphone
US-2017318401-A1 · Nov 2, 2017 · US
Ultrasonic hearing system and related methods
US-2017318397-A1 · Nov 2, 2017 · US
Tonality-driven feedback canceler adaptation
US-2017311091-A1 · Oct 26, 2017 · US
Hearing device comprising a beamformer filtering unit
US-2017295437-A1 · Oct 12, 2017 · US
Hearing aid configured to be operating in a communication system
US-2017257712-A1 · Sep 7, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R25/45?
- CPC H04R25/45 is the Cooperative Patent Classification code for “Prevention of acoustic reaction, i.e. acoustic oscillatory feedback.”
- How many patents are filed under CPC H04R25/45 (Prevention of acoustic reaction, i.e. acoustic oscillatory feedback)?
- Our database includes 145 publications tagged with this CPC code.
- Is patent activity under CPC H04R25/45 growing?
- Publication counts under this code: 9 in 2024 vs 3 in 2025 (latest complete years).