On Sun, 08 Jul 2007 19:46:18 -0700, Jeff Liebermann

>Interesting. So, using my original example, if I take two ultrasonic
>tones, above human hearing, you suggest that I do *HEAR* a beat, but
>that there's no actual component at the beat frequency. The does
>present a problem because if this is true, then the mixing has to
>occurring somewhere in order for my brain to detect the beat
>frequency. Is it mixing in my ear, in the cochlea, in the nerves
>going to the brain, or in the brain somewhere? I don't think it's any
>of these because when I do this experiment, I don't hear any such beat
>note.

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Agreed. I've done the same experiment, and it seems that if the
non-linear detector is presented with tones it can't recognize then
no cross-products are generated.

Same like a mixer with lowpass filters on its inputs, but I can't
seem to pin down your position.

What point are you arguing?


--
JF