I don't suffer from tinnitus, thankfully. But a dumb engineering question: So I guess that the high-pitched ringing is generated directly within the ear, not by the eardrum. So my question is, can you apply noise-cancelling? Noise cancelling headphones sample the ambient noise and generate the same frequency, but 180 degrees out of phase, to effectively cancel the noise. So I'm wondering if the same device, or earbuds, with the ability to manually tune the generated noise (because it cannot hear your ringing), you adjusting it to frequency and phase (that's the harder part, especially at higher frequencies), if this might cancel the ringing? Ideally, if the device could hear the ringing (I don't know if audible with very sensitive sensors, or just goes directly into your brain), that would allow automatic frequency and phase control. I know, easier said than done. But they are doing pretty amazing things these days with robotics, prosthetics, etc, both required extremely sophisticated automatic control theory, audio cancelling is child's play by comparison, and it's been done, the question is whether the device could "hear" the ringing?