Tinnitus-matched sound during sleep (Levo): randomized trial

Record details

Authors: Theodoroff SM, et al.
Journal / source: American Journal of Audiology (2017)
Design: RCT: tinnitus-matched stimulus vs noise masker vs bedside sound generator
Sample: 60
Primary endpoint: TFI, tinnitus intensity ratings
Randomized: Yes · Sham/placebo-controlled: No · Independent of the manufacturer: No

What this research found

The sound-match arm showed the greatest reduction in rated tinnitus intensity; TFI improved across arms without clear sole superiority of the sound-match arm — small study, no long-term data.

VA Portland site; sponsor-linked.

Limitations and conflicts of interest

Small; no long-term follow-up; no independent replication.

Funding / conflicts: Sponsor-linked.

Corrections to this record

2026-09-04: Corrected TFI attribution: sole superiority of the sound-match arm on TFI is not supported; superiority claim confined to rated intensity.

Primary sources

Used as evidence for

Levo System (sleep-time sound matching)

This is an original summary from the Tinnitus Evidence verified database, checked against the primary source — not a reproduction of the publisher's abstract.