I agree. I had my audiology done up to 16 kHz and the taper was apparent after 12 kHz. Sure at 38 years old there should be some taper, but I cannot help but like my high frequency head tinnitus to that spectrum of hearing loss.I don't think the healthy audiograms are telling the whole story with our ears. I think I wiped out what hair cells I had left above 15.5kHz.
If this drug helps restore the nerve / ear connection and hair cell growth, then I can't see why it can't help reduce the tinnitus signal regardless of hearing loss (or, lack of significant hearing loss).
I'm going to see if I can get a point of view on any of this from Frequency Therapeutics. Let me see who I can write to.