There's def. difference with the speakers. Heared 12kHz with one of the mobiles, on the laptop only 8kHz...
Gotta use headphones. I've had hearing tests before. They use headphones. Not really a legit test otherwise.
…and BTW, with headphones? The first test neni posted? I heard nothing,.. no tones at all after 8k hz. That's why I said it was a gag. They didn't have any tones recorded or played on that clip after the 8k sample.
You're only Young Once,.. but you can be Immature FOREVER!