My computer speakers cannot reproduce 18KHz, so I am not surprised that I could not hear anything at all. Perhaps, through my hi-fi speakers, I would hear something. When I was 35, I could hear 20KHz, but now….......I would rather not know.
To tell you the truth, I was kind of surprised that my speakers could produce that frequency. A lot of speakers nowadays are built as cheaply as possible, and one way to cut down costs is to reduce the frequency response of the vibrators. Mine is a decent Bose computer speaker system.
Fascinating information. Is it possible to provide a link to demonstrate these illusions?
It may be easier for me to make some MIDI files. I’ll get back to you on this.
If you want to test the limits of those speakers play “Marimba Eroica”. But be careful with the volume.