Can You Hear This?

[Ryan T]

Well, i just tried this - I could hear up to 17k fine, and the only other one I could hear was 21k. It's like I'm deaf to those in between there.

Also - the most painful one to hear was the 9k one.

may try this again at home where I have a good set of speakers

then you didn't hear the 21k... you heard something distorting 21k to something you could hear.

Not necessarily, you can have a hearing deficiency in a specific range and be able to hear both above and below that range.