Human voice maximum frequency? Reply #25 – 2003-07-16 16:03:56 QuoteThe most important frequencies of speech for comprehension are the 1-3 khz range, which is, oddly enough, the part of the spectrum our ears are most sensitive too. Because we're the most sensitive in this range, it's also the first to experience damage from noise exposure, leading to the need to ask everyone to repeat what they say.That last part isn't true at all - it's higher (much higher) frequencies that go first - and they die almost completely. Contrary to popular belief, it's not just age either. The fact that people lose 16kHz+, 14k+, 12k+ etc etc as they get older is not an aging process - it's noise exposure. In rural societies where noise exposure is minimal, you can find people in their 60s and older who can hear 18kHz!When lower frequencies (e.g. 1-4kHz) are damaged, it's much less a "frequency dependent" phenomenon, and less to do with pure sensitivity. Rather, a lot of the active and non-linear processes of the ear begin to break down. That's one of the reasons that even very good hearing aids aren't perfect. It's not (as the hearing aid manufacturers would have you believe) that you should raise the audio above the (now elevated) threshold, then everything will be fine - it's that the remaining hearing above threshold is not as selective as it once was.Well, that's my understanding of it anyway - there may be newer work that suggests otherwise.Cheers,David.