>or I have recently become too old to hear 17 kHz. If you're in your mid-20s (and you're on HN, so you probably are), it's not terribly unlikely that you've re

>or I have recently become too old to hear 17 kHz. If you're in your mid-20s (and you're on HN, so you probably are), it's not terribly unlikely that you've recently lost that part of your range. In my experience (back when I was young enough to hear those frequencies), even crappy speakers can usually go up to 20kHz easily. Very low frequencies are another story.