Levo System (sleep-time sound matching) for Tinnitus: What Does the Evidence Show?

Current evidence

FDA-cleared sound therapy played during sleep, matched to your tinnitus 'sound print' — one small positive trial.

Evidence strength: Limited (2/5) · Tier 3 — experimental/emerging · Evidence independence: Primarily sponsor-supported.

An iPad-based system (Otoharmonics) that builds a match of your tinnitus sound and plays it through custom earbuds while you sleep; fitted through audiology clinics and distributed in the VA.

Did tinnitus loudness improve?

Limited. In the N=60 VA trial, the sound-match arm had the greatest reduction in rated tinnitus intensity — small study, no long-term data.

Did tinnitus distress improve?

Limited. TFI improved most in the sound-match arm (Theodoroff 2017).

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?

One small sponsor-linked RCT behind a cleared device: 2/5.

Has the result been independently replicated?

None yet. Single sponsor-linked RCT; no replication.

What are the limitations?

• Single small RCT, sponsor-linked
• No long-term or independent replication

Conflicts of interest: Trial linked to the sponsor.

What should patients know about safety?

Safety evidence: Strong. Benign sound exposure.

Is it available?

Regulatory status: FDA 510(k) cleared. Cleared as a tinnitus-masking/sound-therapy device (2014) — clearance means substantial equivalence to earlier maskers, not proven efficacy.

Availability: Audiology clinics; VA distribution · Europe: Limited · Cost (approx.): ≈$4,000–5,000 (self-pay outside VA)

What the studies found

Related treatments

• Sound therapy & masking — Widely used, low-risk, valued by many — but never proven better than placebo in controlled trials.
• Notched sound / notched music therapy — Music with your tinnitus frequency carved out — a modest, unconfirmed loudness effect in tonal tinnitus.
• Neuromonics (and other discontinued cleared devices) — A once heavily marketed $5,000 'acoustic desensitization' program — FDA-cleared, weakly evidenced, now…