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A double Pendulum system where the
lower bob is suspended (via a ball joint to
allow for 2 degrees of freedom) in a laser
array (mesh) so that at any point it is
interrupting 2 lasers, one longitudinal and
the other latitudinal. It's position can be
determined by which lasers it's
interrupting.
Each point has a preset (or
randomly generated) tone and timbre so
that once the pendulum is set in motion,
the chaotic interference between the lower
pendulum and the (to be described) upper
pendulum causes seemingly random and
ever changing patterns of sound.
The upper pendulum may a second
pendulum suspended from a point above
the pivot of the lower pendulum.
OR: [warning: idea within idea]
a Teflon coated paraboloid bowl attached
to the shaft from the lower pendulum
above it's pivot point (like a wine glass).
Inside said parabola is a massive ball. The
motion of the ball up and down the sides
of the paraboloid would act as a second
pendulum, exerting a force on the lower
pendulum. I'm not sure the maths behind
it or if that would work, but hey, it was an
interesting idea for a double pendulum
system.
double Pendulum
http://en.wikipedia...iki/Double_pendulum
[bleh, Oct 17 2007]
[link]
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O so i' late, o'er there then? |
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Oscillation is the variation, typically in time, of some measure about a central value (often a point of equilibrium). Here, between a position of gravitational potential and velocity. |
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Yes.... I understand that... did I violate that
somehow? the second pendulum creates a
complex (chaotic) oscillation due to
interference. <linky> |
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search bakery for [xaviergisz], he has a similar dual pendulum. My comments are merely flippant and, hopefully, humerus. And yes ,for those pedants, I mean the bone to which are attached the dual pendulums of the ulna and the radius. |
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Like the xylophone, this instrument would not work in an environment devoid of gravity. How would initial state be set? Seconds spent positioning the lower pendulum might prove annoying to do every few seconds in a musical performance. [+] |
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//search bakery for [xaviergisz], he has
a similar dual pendulum// |
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could you be more specific? there's a
lot 'o ideas there. |
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//How would initial state be set?
Seconds spent positioning the lower
pendulum might prove annoying to do
every few seconds in a musical
performance. // |
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Well, It's not necessarily meant as a
performance instrument. It's more an
experimental instrument to broaden the
ear's experience. Sort of a musical
muse. |
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But, if you insist, you could add an
electromagnetic at the pivot point to
drive the lower pendulum and inject
energy back into the system at the crest
of each oscillation. This is how Focault
Pendulums keep going. |
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//O so i' late, o'er there then?
// |
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HA! i just got it. though I think it should
be 'o'er there men' |
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Thanks, bleh. One should always try and balance between obtuse and obsolete. |
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[xaviergisz] AND {balancing toy}. |
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I saw that one a while ago when it was
posted. This idea has a fixed pivot so that
no balancing is needed. the pendulum is
hung from a steady base so that it does
not topple over. |
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I did like that idea, even though it would
never work. |
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//hopefully, humerus// balancing a bone there? |
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[po] Convinced myself, I seek not to convince. ~ Edgar A Poe. |
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I like it rather a lot. It would be an interesting sound installation piece, exploring the relationship between chance and equilibrium in the perception of .... |
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Hey, where's that grant application form? |
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A 3 axis accelerometer in the bob should give you enough position data that you don't need this laser array thingy. |
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but the laser array makes it such a cool
visual piece.Of course high power green
lasers would have to be used so they could
be seen in daylight. Possibly a disco ball
bob to shoot the lasers all over the room
(with appropriate eye protection for
everyone of course). |
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where *is* that grant application? |
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