This may be even less scientific than you think. What’s the useful frequency range on your average computer sound card? I don’t know but I suspect that they’re not made to go all the way up to 22 kHz. And even if they are I doubt it would be a flat frequency response. That being said I could detect 17 kHz, really 18 kHz but I don’t think I would notice it if I didn’t know it was playing.
>> MODERATOR NOTE: yes, computer speakers often have a high frequency response of less that 22 Khz, but that just means that the volume is reduced by some amount at these frequencies. It still plays them, it might just be down by 3-6dB or so. You can test this by putting a mic in front of your computer speakers & recording the 22kHz tone… you’ll still see a tone that is definitely loud enough to hear (provided of course that your ears aren’t as dead as mine!)
