You can really hear those 22,00hz notes, makes it very clear? How old are you? Mighty suspect.
from wiki:
Humans have a maximum aural range that begins as low as 12 Hz under ideal laboratory conditions,[SUP]
[3][/SUP] to 20 kHz[SUP]
[note 1][/SUP] in most children and some adults. The range shrinks during life, usually beginning at around age of eight with the upper frequency limit being reduced