[sdiy] resultant Bass, was Brain filling in fundamental

[Ingo Debus]

Am 18.07.2008 um 10:28 schrieb James Dunn:

> However, I remember the sound I heard at a certain point was  
> distinctly like ring modulation (sum and difference) and it sounded  
> like they were not in the space, but in my head!
>

I experenced the same thing when I was playing a sequence of high  
notes on the flute (hearing only an additional lower note, probably  
the difference tone). My flute teacher told me that this is normal.


> Is this an example of non-linear mixing in the ear?

Obviously, what else could it be? Since only one note is played at a  
time, I wonder if it's the currently played note mixing with the  
acoustic echo of the previous one, or if the "mixing" is done in the  
brain?

Ingo