🔉 Did tinnitus loudness improve?
None shown.
No controlled loudness evidence.
Combination aids & fractal tones (e.g., Widex Zen) for Tinnitus: What Does the Evidence Show?
Hearing Technology
Current evidence
Hearing aids with built-in tinnitus sounds — sensible, but the tinnitus add-ons lack independent proof.
Evidence strength: Limited (2/5) · Tier 4 — supportive/symptom-management (limited treatment-specific evidence) · Evidence independence: Primarily sponsor-supported.
Hearing aids that also play masking sounds or generative 'fractal' chime-like tones (Widex Zen being the best-known), usually within a counseling program.
Did tinnitus loudness or distress improve?
🧠 Did tinnitus distress improve?
Limited.
Peer-reviewed evidence is tiny: Sweetow & Sabes 2010 (N=14, manufacturer-affiliated) reported clinically significant improvement in over half of participants; an independent 6-patient pilot found a 20-point THI drop. Larger '~30-point' claims trace to trade articles, not peer review. Cochrane found insufficient evidence that combination aids beat plain hearing aids.
Loudness means the tinnitus percept itself became quieter (psychoacoustic matching or loudness ratings). Distress means questionnaire scores such as THI/TFI, sleep, anxiety or quality of life improved — the sound may be unchanged. A THI/TFI improvement is never evidence the tinnitus got quieter.
How strong is the evidence?
The hearing-aid core is sound; the tinnitus-specific claims are manufacturer-backed only: 2/5.
What the studies found 1 tracked
Sound therapy (amplification devices and sound generators) for tinnitus (Cochrane Review)
Sereda M, et al. · Cochrane Database of Systematic Reviews · 2018 · N=590 (8 trials) · Systematic review of RCTs
Crucially: NO usable data existed for any of the three main comparisons (sound therapy vs waitlist, vs placebo, or vs education alone). The 8 trials only compared device types — hearing aids vs sound generators vs combination devices — with insufficient evidence of any difference (low/very-low certainty).
This is absence of evidence, not 'tested and found no better': trials answering the sound-therapy-vs-placebo question simply have not produced usable data. Sound remains widely used, low-risk, and valued by many patients.
What are the limitations?
- No independent RCTs of the tinnitus features
- Cochrane: no proven advantage over plain hearing aids
- Trade-press claims exceed the peer-reviewed numbers
Conflicts of interest: Evidence base is manufacturer-affiliated.
Has the result been independently replicated?
Same group/sponsor only. Supporting studies are manufacturer-affiliated (same commercial research network).
What should patients know about safety?
Safety evidence: Strong. Safe.
Is it available?
Regulatory status: Regulated as hearing aids.
Availability: Via audiologists · Europe: Via audiologists · Cost (approx.): $2,000–7,000/pair
Related treatments 2
- Cochlear implants (for qualifying hearing loss) — For people with severe hearing loss, implantation often genuinely reduces the tinnitus sound itself — one of…
- Hearing aids (with hearing loss) — For people with hearing loss and tinnitus, hearing aids are among the most established and accessible…
Evidence last reviewed: 2026-09-04 · Evidence included through: 2026-09-04 · Confidence: moderate. Open the interactive evidence profile · How we rate evidence.
This page summarizes published research for education. It is not medical advice; it cannot say what will work for any individual. Discuss treatment decisions with a qualified clinician.