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Thread: This is truly fascinating, trust me :)

  1. #1
    Grumpy and VERY old :( g8ina's Avatar
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    This is truly fascinating, trust me :)

    http://io9.com/5947112/watch-32-disc...ter-of-minutes

    32 metronomes set off at odd times, manage total synchrony with 2 and a bit minutes !!

    Hypnotic !
    Cheers, David



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  3. #2
    Banhammer in peace PeterB kalniel's Avatar
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    Re: This is truly fascinating, trust me :)

    They're all set to the same frequency I presume?

    It's cool. Was expecting Ligeti.

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    Re: This is truly fascinating, trust me :)

    Pretty cool, I like it

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    mmh
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    Re: This is truly fascinating, trust me :)

    Like marching soldiers.... GET IN LINE!
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    Re: This is truly fascinating, trust me :)

    Metronomes are used to provide a stable beat or "pulse". This proves that they are unreliable as to reach syncronisation, some or all must either increase or decrease the time between pulses.

    Incredible results though, just shows nature strives towards harmony.

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    Banhammer in peace PeterB kalniel's Avatar
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    Re: This is truly fascinating, trust me :)

    Quote Originally Posted by Chadders87 View Post
    Metronomes are used to provide a stable beat or "pulse". This proves that they are unreliable as to reach syncronisation, some or all must either increase or decrease the time between pulses.
    They're stable in the absence of exterior forces. This experiment demonstrates what happens if you allow exterior forces (the back and forth motion of metronomes) to affect surrounding metronomes.

    Incredible results though, just shows nature strives towards harmony.
    No it doesn't

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    Evil Monkey! MrJim's Avatar
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    Re: This is truly fascinating, trust me :)

    I think this is similar to the effect originally encountered after the Millennium footbridge was opened; the movement of people walking over the bridge became 'syncronised' and caused the already flexible bridge to wobble excessively. Something to do with its 'resonant frequency', if I remember correctly? An amazing effect though

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    Re: This is truly fascinating, trust me :)

    Love it, and it reminds me of the pendulum wave thing

    https://www.youtube.com/watch?v=7_AiV12XBbI
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    Not a good person scaryjim's Avatar
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    Re: This is truly fascinating, trust me :)

    Quote Originally Posted by Jimbobgod1969 View Post
    I think this is similar to the effect originally encountered after the Millennium footbridge was opened; the movement of people walking over the bridge became 'syncronised' and caused the already flexible bridge to wobble excessively. Something to do with its 'resonant frequency', if I remember correctly? An amazing effect though
    It's a similar, although not identical, phenomenon. As humans actively adjust their stride patterns to fit with existing movement you get a positive feedback loop - people walking on the bridge makes it resonate, the resonance makes people adjust their stride to match the resonant frequency, and when people start walking at the resonant frequency the bridge resonates more, increasing the effect (until worst case scenario you get to the point where the resonance destroys the bridge - see Tacoma Narrows).

    With the metronomes you don't get the positive feedback - instead each metronome forces its neighbours to swing at a frequency which is most likely not it's resonant frequency - there'll only be a couple of metronomes being forced at their resonant frequency, which is what drives all the rest. Kind of

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    Re: This is truly fascinating, trust me :)

    I was really hoping that last pink one would hold out, it made a real go of it

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    Re: This is truly fascinating, trust me :)

    Quote Originally Posted by cookie365 View Post
    I was really hoping that last pink one would hold out, it made a real go of it
    cookie goes the under dog

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    Re: This is truly fascinating, trust me :)

    I may wrong, but surely the only thing causing these metronomes to become synchronised is the movement of the suspended surface they are on...
    =========
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    Banhammer in peace PeterB kalniel's Avatar
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    Re: This is truly fascinating, trust me :)

    Quote Originally Posted by Bunjiweb View Post
    I may wrong, but surely the only thing causing these metronomes to become synchronised is the movement of the suspended surface they are on...
    Yep. And the movement of the surface is governed by the forces exerted on it by the metronomes.

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    Seething Cauldron of Hatred TheAnimus's Avatar
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    Re: This is truly fascinating, trust me :)

    Ouput / Input = Forward / (1-Loop)
    throw new ArgumentException (String, String, Exception)

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    Re: This is truly fascinating, trust me :)

    My OCD nearly exploded towards the end, bottom right would have been shot if I were running the experiment

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    Not a good person scaryjim's Avatar
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    Re: This is truly fascinating, trust me :)

    Quote Originally Posted by Lowe View Post
    My OCD nearly exploded towards the end, bottom right would have been shot if I were running the experiment
    *ahem*


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