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???
06/22/06 17:23
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#118859 - Yes, but...
Responding to: ???'s previous message
Christoph said:
You could just mix the two signals digitally and play them. You would hear two separate tones (that is, if you can hear frequencies that high, and your audio equipment is of sufficient quality).

Yes, but then you don't know, whether the ear or the unideal tweeter is the reason for the effect. Both, the ear and the tweeter show a distortion factor of about 1%.

Christoph said:
In order to get noticable intermodulation, you need to have a nonlinearity that has a rectifying characteristic (think "diode"). The human ear doesn't do that.

Are you sure? There are many unideal and non linear working "parts" involved before the brain gets a signal from the ear. I have read somewhere, that the human ear is responsible for a distortion factor of about 1%. This could be enough to generate noticable intermodulation tones.

Kai

List of 23 messages in thread
TopicAuthorDate
High pitched ring tones            01/01/70 00:00      
   LM556            01/01/70 00:00      
   Download The Ring Tone.            01/01/70 00:00      
   Adding signals with two frequencies            01/01/70 00:00      
      Sure?            01/01/70 00:00      
         Yes, quite sure.            01/01/70 00:00      
            Intermodulation not beat frequencies            01/01/70 00:00      
               Remember piano tuners            01/01/70 00:00      
                  A test should tell it            01/01/70 00:00      
                     Tuning instruments.            01/01/70 00:00      
                        Yes, but...            01/01/70 00:00      
                           Mixing 2 ultrasonic frequencys            01/01/70 00:00      
                              Cool!            01/01/70 00:00      
                                 We experimented with the "ionovac"            01/01/70 00:00      
                              Mixing two rf signals            01/01/70 00:00      
   Adding signals with two frequencies            01/01/70 00:00      
   Don't do that!            01/01/70 00:00      
      I'm with Andy            01/01/70 00:00      
         active noise reduction            01/01/70 00:00      
         Rest your fears            01/01/70 00:00      
   a better idea            01/01/70 00:00      
   Detecting high pitch sounds            01/01/70 00:00      
      No, no, do it the hard way            01/01/70 00:00      

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