Recent content by Slumberland

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    High School Visual respresentations of topics in Astronomy

    Okay, not to spam you, but I admit to being obsessed with this problem (expressing math and physics in a natural way). For example: http://poppersdreamland.blogspot.com/2012/05/kirkmans-schoolgirls-revenge.html Don't bother to read the blog. The cards, the hanging pentagon and the puzzle are...
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    High School Visual respresentations of topics in Astronomy

    Oooooooooooooooooh. I get it. You're kind of hunting for iconography? But not just icons. Representations that express the essential qualities AND measured relationships -- because it's physics -- maybe? now that strikes me as a very interesting question. I'll trim down my previous...
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    High School Visual respresentations of topics in Astronomy

    @tractive: The context is still unclear. Let's try not to miss each other. Some things to consider: 1) You can always reduce a complex relationship to a simple one, by throwing away information. Keep information that isolates and describes a distinct element of the problem. 2) The...
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    Can I define frequency for an non periodic signal?

    I am trying to. There is no point to introducing the vibrating string if we are not in agreement that there is such a thing as harmonic motion, and that this motion describes the boundary conditions imposed on an elastic cord stopped at both ends, and then displaced. For signal analysis...
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    Can I define frequency for an non periodic signal?

    *Sigh* Please talk physics and math. Are you giving up the initial assumption that musical tones are harmonic? Into what global context are you introducing these non-periodic elements? If you have a different groundwork, please substantiate your position carefully and at length. Start at...
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    Can I define frequency for an non periodic signal?

    um. thanks! *blush* *awkward feet* I forgot the OP's specific question! It's buried in 6) the vertical columns of noise. I would trade "zero frequency" for "zero period": f(t) = f(t +0). Which is every function. :) Uncorrelated noise spits out noise. AllFrequenciesAtOnce...
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    Can I define frequency for an non periodic signal?

    Oh. I chose the sentence because the sequence of vowels: EAting PIgs mAkes mEn fAt IPA {i} {I} {e} {ε} {æ} ... illustrates some characteristics of formants. Below the blue waveform, there are bright clumps of frequency bands, separated by a region with less energy. These...
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    Can I define frequency for an non periodic signal?

    Picture worth many words. Here is a spectrogram of me saying "Eating Pigs Makes Men Fat.": Several things to note: 1) Predetermined, frequency-band rules for representing the voice are meaningless. 2) This is windowed analysis. I told RX to use 2048 frequency bands and muliple window...