Not to be a downer, but the Phase 1b results don't indicate that it "easily" helps 8,000 Hz (at least with one dose). There was no statistically significant pure tone audiogram differences between the treated and placebo groups.
What is true is that there were "things to note" regarding this. From the published paper:
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Multiple doses could make the result even more pronounced, but we don't know yet. Their pharmacokinetics study did show the two drugs reaching the Scala Tympani at the location that corresponds with 8,000 Hz, which is promising.