A Cochlear Implant User Hears Nothing Above 70 Hz — and the HN Crowd Has Ideas

My psychophysics as a bilateral cochlear implant user

A bilateral cochlear implant user documents their psychophysics experiments, reporting that they can distinguish nothing in any input above 70 Hz. Commenters push back on the approach: rather than probing the implant's modulation hardware with content it can't resolve, they suggest pitch-shifting music down 300–400% to move melodies into the audible band, low-pass filtering above 70 Hz, and consulting an audio or signals engineer instead of relying on GPT and a Lean 4 verifier.

You're getting some wildly mixed signals (bad pun) about how all this works, I think.

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2026-11-05