Audio AC components or DC?

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#42
N101N said:
You should not believe what you believe. Again, mathematical entities (0 Hz, phase delay, the sinusoidal waveform...) have no physical meaning and make no sense outside of a particular mathematical model. Why don't you try to look beyond your superficial knowledge?
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Yes, you are right of course: my undergraduate studies in theoretical physics and doctoral studies in EE were quite superficial compared with your advanced knowledge. Could you just remind us about your education in maths, science and engineering?

The Fourier theorem does not represent anything physical.
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Yes, Fourier must have been a bit stupid to think that his theory could help him to calculate heat flow in metals.

Does anything in maths work for you? For instance, when you count things do you use integers?
 
#44
N101N said:
The signal imposes its characteristics on the propagation medium. The excitation process has considerable complexity, but is very well understood. It is not included in the Fourier theory.



You should not believe what you believe. Again, mathematical entities (0 Hz, phase delay, the sinusoidal waveform...) have no physical meaning and make no sense outside of a particular mathematical model. Why don't you try to look beyond your superficial knowledge?
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I'll have what he is drinking!

Jan
 
#45
N101N said:
........mathematical entities (0 Hz.......) have no physical meaning... .... .... .... ....
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I have to agree with this snip. There is no true DC.

True DC has to exist forever. If it ever has changed, then it is a transient.

We have few or no long-term "DC" sources. A 100 year battery rose from zero to xVDC 101 years ago and is now a 1^-10Hz signal.

Further: batteries fade-away and DC generators wax and wane over time. Not pure zero Hz DC.

Since I am less than 100 years old, I'm not sure where the practical point is.
 
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