[sdiy] Phase shifts and instantaneous frequency

[Aaron Lanterman]

On Jul 15, 2008, at 8:52 AM, Ian Fritz wrote:

> You can *easily* demonstrate to yourself that differences in phase  
> are, in fact, audible.  To do this, make a signal with two sine  
> waves at 100 and 201 Hz.  This is a signal with a slowly varying  
> phase difference between the two components.  If the phase  
> differences don't matter, then you will hear a steady tone.  If they  
> do matter, then you will hear beats.  In fact, you *do* hear beats.   
> Yes, you can easily detect phase differences between two tones.  (I  
> learned about this from one of the websites I ran across during our  
> previous discussion of this topic.)

Huh. That shows up when you're working with RF equipment all the  
time... I had no idea that happened in the ear too.

- Aaron