>> The electrical signal traveling through the amplifier cannot have a doppler shift with respect to the receiver because the person is not a receiver for the electrical wave. The person only becomes the receiver when the signal is the sound wave. Whatever happens inside the amplifier has nothing to do with doppler shift.<<
Musicnoise,
I understand your confusion in this matter. Let me try to put it a different way. We all use computers and are familiar with ZIP files yes? For those who dont know it simply a way to compress a file using an algorithm which when de-compressed or unzipped will restore/recover the original file. If you write a letter to someone and zip it up email it to your friend and he unzips it on his PC he will have a virtual copy of the original file. The analogy is a stretch but stay with me.
If you use an editor program and make small changes to the zip file (while it is in the zipped format) and then unzip it. What would you get? Well depending on how much you tampered with it you may have some misspelled words, an extra character or some other deviation from the original letter.
The point is that even though the output letter was properly decoded by the unzip program, the letter displays the results of damage done to it while it was in another format.
If you record a voice speaking into a microphone the acoustic energy striking the mic is converted to the electrical world. This electrical format is the handled as you would expect in a long journey until finally it is converted back to acoustic energy by your loudspeakers. If however you tamper with the signal in while it is still in the electrical format - what you will hear (after conversion) by your loudspeakers is the acoustic equivalent of the damage done to the recording. In this case it is the Doppler you describe as only made possible by some physical motion in the acoustic world.
It is possible for an event that is occurring inside an amplifier to have this very effect on the outside world. In this case the person becomes the receiver of sound waves that contain the extra sonic effects that are the direct result of a signal passing through an unstable electrical world. The encode/decode algorithms at a finite level do not match.
Regards,
Roger
Musicnoise,
I understand your confusion in this matter. Let me try to put it a different way. We all use computers and are familiar with ZIP files yes? For those who dont know it simply a way to compress a file using an algorithm which when de-compressed or unzipped will restore/recover the original file. If you write a letter to someone and zip it up email it to your friend and he unzips it on his PC he will have a virtual copy of the original file. The analogy is a stretch but stay with me.
If you use an editor program and make small changes to the zip file (while it is in the zipped format) and then unzip it. What would you get? Well depending on how much you tampered with it you may have some misspelled words, an extra character or some other deviation from the original letter.
The point is that even though the output letter was properly decoded by the unzip program, the letter displays the results of damage done to it while it was in another format.
If you record a voice speaking into a microphone the acoustic energy striking the mic is converted to the electrical world. This electrical format is the handled as you would expect in a long journey until finally it is converted back to acoustic energy by your loudspeakers. If however you tamper with the signal in while it is still in the electrical format - what you will hear (after conversion) by your loudspeakers is the acoustic equivalent of the damage done to the recording. In this case it is the Doppler you describe as only made possible by some physical motion in the acoustic world.
It is possible for an event that is occurring inside an amplifier to have this very effect on the outside world. In this case the person becomes the receiver of sound waves that contain the extra sonic effects that are the direct result of a signal passing through an unstable electrical world. The encode/decode algorithms at a finite level do not match.
Regards,
Roger