Borrowed a signal generator to test my system and inadvertently discovered I'm deaf as a post above about 12.5KHz
I'm not sure of the unit's calibration but my wife and children could clearly hear up to 17Khz. So even assuming the generator was 3KHz out (highly unlikely), and they could hear up to 20KHz, I'm still 4.5Khz down.
I guess that's 27 years in industrial maintenance for you despite being pretty careful to use hearing protection.
Thing is, I don't feel I'm missing anything, so what *am* I missing?
What sort of sounds are above 12KHz, on recordings or otherwise?