HearEQ

HearEQ turns a personal audiogram into a starting EQ profile for listening to music through headphones. It’s grounded in NAL-R, a published, peer-reviewed prescription model used in audiology - not a formula I invented - and it’s explicit about what it is: an experimental starting point, not a medical device and not a replacement for a hearing aid or an audiologist’s fitting.

Everything runs client-side. You enter your audiogram thresholds, the app computes a target gain curve per frequency band and fits a small set of parametric filters to approximate it, and you get a profile you can export to EQ software. Headphone correction (measured response vs. a target curve) and hearing correction are kept as two separate, visible layers rather than one opaque number, so you can see what each one is actually doing.

Built with Next.js, React, and TypeScript, styled with Tailwind - a small, focused tool that exists because the “just turn up the treble” advice floating around online isn’t grounded in anything.