What about the sound tongue stimulation

The short version: I can't tell you whether tongue stimulation helps tinnitus, because neither study in front of me is about tinnitus, or about sound stimulation of the tongue.

Both records are off-target. One is a study of how songbirds use their beaks and tongues to husk seeds [1]. The other is a single-case nursing report on oral motor stimulation in a very low birth weight preterm infant, where a 7-day massage protocol was followed by weight gain and a LATCH breastfeeding score rising from 7 to 9 [2]. Neither tested a device that delivers sound through the tongue, and neither measured tinnitus.

So the honest answer is that this retrieval gives me nothing to weigh. Outside these records, tongue-based sound stimulation is a real device category marketed for tinnitus, and the general clinical picture is that it is investigational, with small trials and no convincing evidence it beats masking or CBT. I cannot confirm any specific trial's size or result from memory, and I won't invent one.

What would settle it: a randomized trial in tinnitus patients comparing the device to a sham device, with a validated distress score as the outcome, and follow-up long enough to show the effect isn't just attention or placebo. I have not seen that here.

My call: don't spend money on tongue sound stimulation for tinnitus based on this evidence; it is unproven and the burden is on the seller. Confidence: low, because the evidence in front of me does not address the question at all.