speak for yourself, man. I have some tones below 8k that I barely even think about. The 14-15 khz whines are the ones that bother me, when I am bothered by this.
Below 8k is not 'lower' . Try having tones below 100hz. It's whole different kind of torture when your head is really full and feels like having a bass box near your ears. I can only agree with Ben since I have both extremely low frequency tones but also several ones above 6k. Don't really care for the high ones.
Low frequency oscillating drone t is just extremely exhausting.
Not saying people don't suffer from high t. Just wanted to point out what low means.