Receiver White Noise vs frequency gen vs test CD

[emorphien]

40Hz - 22KHz = the audible range

I highly doubt you can hear 20Khz, let alone 22. As we age our high frequency hearing worsens dramatically. You should however still be able to hear sound in the 20-40Hz range, and human hearing is generally considered to be about 20Hz to 20KHz, with the top end dropping off fastest.

As far as pitch, look up your terms. Pitch is just a musicians way of referring to frequencies.