I’m 53, an ex-sound engineer. Got really over exposed to loud sounds during the rave scene in the UK during the 90s. I have bad tinnitus in both ears & a high frequency loss in my right ear. I can hear the fundamentals up to the 12Khz ok, but my cheap sound card gives audible harmonics for many of the higher samples. (I obviously would not have been able to hear the true tones even on good equipment in a perfect anechoic chamber) Great site! & take it from me kids, PROTECT YOUR EARS!! or you like me will have to live with Mr.Hisssssssss in your head.
Best Regards Steve.