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by mike555
2989 days ago
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While I do like the aesthetics of this, as others have mentioned it is plain wrong. Any explanation of resonance should deal first and foremost with a physical system, not a signal. Having two signals 'resonate with each other' does not make a lot of sense. Not sure what is meant with multiplying because the author then goes to mention integration which in essence, is adding, not multiplying. A physical system is able to store energy at specific frequency -- a pendulum will swing for a long time, energy slowly decaying. But if the system is excited (imagine a kid on a swing), with each push, we will add some more energy, which will accumulate each time adding to a large response (resonance). The key part is, we need to add energy at the right frequency, push at the right interval, sing with the proper pitch. |
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>Not sure what is meant
Which is it? :-)
As I interpret it, this article is not a scientific description of a particular physical system, but a metaphor.
That said, it does make sense in the signal domain. Consider electrical and optical resonance. It gets more interesting when the components are complex-valued.