Hearing Aid Fitting Patents: Who Leads, Where the Gaps Are 2026
- 57.0% of all 186 records sit with the top five assignees alone — this field is concentrated, not fragmented.
- Filing fell 63% from 8 records in 2021 to 3 in 2024, the last year with complete publication data.
- H04R covers 88.2% of records while diagnosis-related A61B claims trail at 28.5% — most activity is still transducer-side, not measurement-side.
Filing growth compares 2021 (8 records) with 2024 (3) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 186 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks 186 published records at the intersection of hearing aid fitting workflows and self-fitting hearing devices, filtered to documents that discuss real ear measurement, prescriptive formulas, user adjustment, audiogram estimation, remote fine tuning or adoption rate alongside the core fitting terminology. Coverage runs from 2015 through the 2026-07-31 data cut-off, so the most recent one to two years are still filling in as publications catch up with filings.
The field sits at the boundary of consumer audio hardware and clinical diagnostic method, which is why the technology composition below shows heavy overlap between transducer classifications and diagnosis-and-surgery classifications rather than a single dominant category.
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Filing trends and technology composition
Publication counts by year and by IPC subclass, drawn from the same 186 records used throughout this page.
Filing trend, 2017-2026
Filings peaked at 27 records in 2019, then declined; the 2021-to-2024 span shows an 8-to-3 drop, a 63% fall over three years. Because publication lags filing by roughly 18 months, 2025 and 2026 figures are not yet complete and should not be read as a continued decline.
IPC subclass distribution
H04R (loudspeakers and audio transducers) appears on 88.2% of the 186 records, far ahead of A61B (diagnosis and surgery) at 28.5% and H04M (telephonic communication) at 8.6%. Because a single record can carry multiple IPC classes, these shares sum to well over 100% and should be read against the 186-record total, not against each other.
Shares are the percentage of the 186 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hearing Aid Fitting and Self-Fitting Devices with Eureka
This page is one run against one query. Ask Eureka your own question about hearing aid fitting and self-fitting devices and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art in this space
US5923764A — Virtual electroacoustic audiometry for unaided, simulated aided, and aided hearing evaluation
A hearing evaluation and hearing aid fitting system provides a fully immersive three-dimensional acoustic environment to evaluate unaided, simulated aided, and aided hearing function of an individual. Digital filtering of signal sources representing speech and other sound stimuli according to selected models and signal processing parameters synthesizes a simulated acoustic condition for objective and subjective hearing evaluation. An intra-canal prosthesis incorporating a microphone probe is positioned in the ear canal to measure the resulting acoustic field.Filed by K/S HIMPP, published 1999-07-13 — one of the most-cited records in this dataset at 138 citations.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5825894A | Spatialization for hearing evaluation | 199 |
| 2 | US6167138A | Spatialization for hearing evaluation | 164 |
| 3 | US5645074A | Intracanal prosthesis for hearing evaluation | 143 |
| 4 | US5923764A | Virtual electroacoustic audiometry for unaided simulated aided, and aided hearing evaluation | 138 |
| 5 | US5785661A | Highly configurable hearing aid | 131 |
| 6 | US20130243227A1 | Personal communication device with hearing support and method for providing the same | 122 |
| 7 | US20150023512A1 | Online hearing aid fitting system and methods for non-expert user | 116 |
| 8 | US20080298600A1 | Automated real speech hearing instrument adjustment system | 106 |
| 9 | US20150023534A1 | Interactive hearing aid fitting system and methods | 89 |
| 10 | WO2012066149A1 | Personal communication device with hearing support and method for providing the same | 73 |
Citation counts reflect influence within the searched corpus and skew toward older filings; treat them as a signal of historical importance rather than current filing activity.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns emerge from the assignee ranking, the filing trend and the class distribution that matter for anyone deciding where to file next.
The field is led, not fragmented
Five assignees account for 106 of the 186 records in scope, and the top ten extend that to 78.0%. A single leader holds 44 records against a fifth-place count of 11 and a tenth-place count of 6 — the drop-off from first place is steep, then the field flattens into a long tail of smaller filers.
Filing volume has cooled from its 2019 peak
Filings peaked at 27 records in 2019 and fell to 3 by 2024, the last year with complete publication data. Several of the largest historical assignees show no filings in the latest tracked year, consistent with a maturing claim landscape rather than a growing one.
Transducer claims outweigh diagnostic-method claims
H04R (loudspeakers and audio transducers) appears on 164 of 186 records, while A61B (diagnosis and surgery) — the class most associated with real ear measurement and audiogram estimation methods — appears on 53. The gap suggests device-side claims are more heavily filed than measurement-method claims.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hearing aid fitting and self-fitting devices, with the prior art for and against each one.
Who holds the ground, and where it is open
The ranked leaders concentrate over half the dataset between them, but several sub-areas inside the fitting workflow show far fewer filings.
One assignee sets the pace
The top-ranked assignee holds 44 of the 186 records in scope, well ahead of the fifth-ranked filer at 11. That gap is wide enough that a new entrant competing head-on in the leader's core claims faces a dense prior-art wall.
The middle of the ranking is thin
Filings drop from 11 records at fifth place to 6 at tenth, and the top ten together hold 78.0% of all 186 records. Companies outside that group are filing in single digits, which is where collaboration and licensing activity tends to concentrate.
Co-filing is limited but not absent
Only six co-assignee pairs appear across the dataset, with the strongest pairing linked at 5 shared records. That is a modest amount of joint filing for a field this concentrated, suggesting most leaders are building their own portfolios rather than filing jointly.
| Assignee | Recent year | YoY |
|---|---|---|
| Widex A/S | 0 | -100% |
| Decibel Instruments Inc. | 0 | — |
| Oticon | 0 | — |
| Northwestern University | 0 | — |
| GN Hearing A/S | 0 | — |
| Sonova AG | 0 | — |
| Signison GmbH | 0 | — |
| SHIM YOON JOO | 0 | — |
Where to take this analysis
The dataset points to a mature, leader-held core with pockets of lighter filing around measurement and remote-adjustment methods.
Check freedom-to-operate against the leader's core claims
With 44 of 186 records held by a single assignee, any new fitting-device filing should be checked against that portfolio's claim scope before drafting, particularly in H04R transducer classifications.
Run a claim comparison in Eureka →Explore the under-claimed measurement branches
A61B-classified diagnostic method claims sit at 28.5% of records versus 88.2% for device claims, leaving audiogram estimation and real ear measurement automation comparatively lighter ground.
Map white space in Eureka →Common questions about this landscape
The ranked leader in this 186-record dataset holds 44 records, well ahead of the fifth-ranked assignee at 11. The top five assignees combined account for 57.0% of all records in scope, and the top ten extend that to 78.0%. This is a concentrated field where a small number of established audiology and hearing-device companies hold most of the filed claim space, with a long tail of smaller filers behind them.
Filing activity peaked at 27 records in 2019 and has declined since, falling from 8 records in 2021 to 3 in 2024, a 63% drop over that span. 2024 is the last year with complete publication data; 2025 and 2026 figures will keep rising as publications catch up, since publication typically lags filing by around 18 months. Several of the largest historical assignees show zero filings in the most recent tracked year, consistent with a field that has passed its filing peak.
H04R, the IPC subclass covering loudspeakers and audio transducers, appears on 88.2% of the 186 records in scope, making it by far the dominant classification. A61B, covering diagnosis and surgery methods relevant to real ear measurement and audiogram estimation, appears on 28.5% of records. Smaller shares touch telephonic communication, digital data processing, wireless networks and healthcare informatics, each under 10% of records.
The technology composition shows a clear gap between device-side claims (H04R at 88.2% of records) and measurement-method or software-side claims: G16H healthcare informatics and G02C spectacles-integration classes each sit at only 2.2% of records. Remote fine-tuning workflows, audiogram estimation algorithms and self-fitting user-interface adjustment logic are all inside the search scope but carry noticeably fewer filings than the transducer core. These are the branches worth checking before committing claim drafting effort.
US5923764A, assigned to K/S HIMPP and among the most-cited records in this dataset at 138 citations, claims a system for evaluating hearing using a fully immersive three-dimensional acoustic environment with an intra-canal microphone probe. Its high citation count signals it is treated as foundational prior art within the searched corpus, particularly for aided and simulated-aided hearing evaluation methods. Anyone drafting claims around spatial or virtual audiometry evaluation should review its claim scope closely, since citation depth like this usually means examiners already cite it routinely against related applications.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.