It is a common put-down of audiophiles: "You're imagining things." But is this a meaningful criticism? Is there a real difference between "reality" and "illusion"? Or was Professor Dumbledore on to something?
I have been interested in human perception almost as long as I have been working in magazines. This sound is something with which everyone in this room will be familiar: a 1kHz tone at –20dBFS.
[Play 1kHz, –20dBFS sinewave tone]
What I'd like you to do now is to imagine the same tone for 10 seconds.
I believe a scan of…