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Which physical object sends random vibrations?

Anything about MUSIC but doesn't fit into the forums above.

Moderator: Moderators (Main)

KVRist
 
433 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sat Jan 11, 2014 2:21 am Re: Which physical object sends random vibrations?

It should be similar to resonant bandpass filtered white noise.
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KVRAF
 
8954 posts since 7 Dec, 2004, from Vancouver, Canada
 

Postby aciddose; Sat Jan 11, 2014 2:57 am Re: Which physical object sends random vibrations?

No, not even close. Look into the chaos oscillator stuff and you'll see it's quite different. The waveform does have a specific frequency, but it contains a lot of harmonics which would not be present in a filtered signal. Also look at avalanche reverse-breakdown and the random ramp waveforms (very similar) generated that way.

The whistle mentioned in the linked article is going to exhibit a waveform similar to that due to pressure built up by turbulence being suddenly released.

Regardless, you're not going to find a reliable way to trigger this sort of motion and the thought you might is honestly ridiculous.

Instead, you can drive a motor or if you're really completely insane you can attempt to control the shape of the physical result using a servo. One servo you might be familiar with is also known as a "speaker".

You can purchase both of these for a few dollars and drive them with any signal you like.

For example if you need very high frequency low-distortion output you can build your own "candle tweeter", a plasma-arc transducer with its plasma generated reliably by a candle. Of course you have to avoid blowing out the candle and use of paper or other flammable cones is not recommended :hihi:

If you want bandpass filtered noise get an air pump and a flue pipe.
KVRist
 
433 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sat Jan 11, 2014 8:03 am Re: Which physical object sends random vibrations?

aciddose wrote:If you want bandpass filtered noise get an air pump and a flute pipe.
I meant it should sound like bowed string and not blown pipe.
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KVRAF
 
4244 posts since 20 Jul, 2010
 

Postby Sendy; Sat Jan 11, 2014 8:27 am Re: Which physical object sends random vibrations?

How about using resonant bandpass filtered white noise?
http://sendy.bandcamp.com/releases < My new album at Bandcamp!
KVRist
 
207 posts since 2 Jan, 2010

Postby HTBoogie; Sat Jan 11, 2014 8:39 am Re: Which physical object sends random vibrations?

What you seem to describe does not exist. Any physical object will have one or more resonant peaks. These are a function of its dimensions and material properties. You cannot beat physics.
KVRist
 
433 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sat Jan 11, 2014 8:50 am Re: Which physical object sends random vibrations?

HTBoogie wrote:Any physical object will have one or more resonant peaks. These are a function of its dimensions and material properties. You cannot beat physics.
You mean when the harmonics have frequencies too close to each other. it starts to sound like all resonances has their own volume LFO.
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KVRAF
 
7887 posts since 20 Nov, 2003, from Lost and Spaced
  

Postby osiris; Sat Jan 11, 2014 12:58 pm Re: Which physical object sends random vibrations?

I believe you're describing a tuning fork....
(bing)
KVRAF
 
3049 posts since 25 Jun, 2004
 

Postby highkoo; Sat Jan 11, 2014 1:22 pm Re: Which physical object sends random vibrations?

Image
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KVRAF
 
2589 posts since 2 Jul, 2007, from Oxycontin Acres, Georgia, USA

Postby SODDI; Sat Jan 11, 2014 1:47 pm Re: Which physical object sends random vibrations?

Or you could just hang up a windchime.
KVRist
 
490 posts since 14 Feb, 2006, from Berkeley, CA

Postby Winstontaneous; Sat Jan 11, 2014 1:49 pm Re: Which physical object sends random vibrations?

vurt wrote:
Frantz wrote:Monkeys are physical objects that do an excellent job of randomly vibrating cymbals.

Image


dont kick a chimp in the nuts though, hell eat your face!

Better stay away from him /
He'll rip your lungs out, Jim!
KVRist
 
433 posts since 20 May, 2010, from Home

Postby Jedinhopy; Sat Jan 11, 2014 1:56 pm Re: Which physical object sends random vibrations?

I want the harmonics that appears after you have hit the cymbal with fingernails should sustain forever instead of decaying into silence.
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KVRAF
 
4244 posts since 20 Jul, 2010
 

Postby Sendy; Sat Jan 11, 2014 2:03 pm Re: Which physical object sends random vibrations?

Jedinhopy wrote:I want the harmonics that appears after you have hit the cymbal with fingernails should sustain forever instead of decaying into silence.


Tough. :party:
http://sendy.bandcamp.com/releases < My new album at Bandcamp!
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addled muppet weed
 
34207 posts since 25 Jan, 2003, from through the looking glass
 

Postby vurt; Sat Jan 11, 2014 3:13 pm Re: Which physical object sends random vibrations?

Jedinhopy wrote:I want the harmonics that appears after you have hit the cymbal with fingernails should sustain forever instead of decaying into silence.



keep hitting it forever then :shrug:
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KVRAF
 
8850 posts since 12 Mar, 2012, from South Bavaria - near the alps... :-)

Postby Tricky-Loops; Sat Jan 11, 2014 3:17 pm Re: Which physical object sends random vibrations?

Make a tricky loop with the decay!
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KVRAF
 
8954 posts since 7 Dec, 2004, from Vancouver, Canada
 

Postby aciddose; Sat Jan 11, 2014 3:37 pm Re: Which physical object sends random vibrations?

Jedinhopy wrote:
aciddose wrote:If you want bandpass filtered noise get an air pump and a flute pipe.
I meant it should sound like bowed string and not blown pipe.


Why edit my post to say "flute" when I clearly said "flue" ? They are not the same thing!
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