Jump to:  Bottom  Last Post
 MacGuffin
Female, 30-39, Europe
 2597 Posts
|
Friday, August 03, 2012 11:29:31 AM
Need some more sticky tape, guys? |
|
 oldallen671
Male, 30-39, Western US
23 Posts
|
Friday, August 03, 2012 5:05:52 AM
Very pleased to tell you www.chinesegirlfind.com is designed to display pictures of pretty girls website, We will be beautiful Chinese girls are introduced to foreign friends, please be assured that all this is legal.You will see the latest nylon stockings, black stockings, sexy heels, sexy swimsuit,bikini girl.chinesegirlfind being named the "2012 Most Beautiful Girl", please give them to vote, to win the opportunity to make friends with them! please visit: http://www.chinesegirlfind.com
 |
|
 OldOllie
Male, 50-59, Midwest US
8947 Posts
|
Thursday, August 02, 2012 10:18:46 PM
A video is just series of still images at ~24 frames per second. If the exposure time for each image is short enough, it can freeze a moving object without blurring it. When the frame rate is near an even factor of the frequency of the vibrating string, it can appear to slow down or even stop. It's the same phenomenon seen in old western movies when the stage coach wheels appear to be turning backwards. |
|
 PTPete
Female, 30-39, Western US
1230 Posts
|
Thursday, August 02, 2012 8:54:48 PM
Nice |
|
 kemic
Male, 18-29, Europe
159 Posts
|
Thursday, August 02, 2012 6:52:32 PM
its called hertz |
|
uatme
Male, 18-29, Canada
795 Posts
|
Thursday, August 02, 2012 5:38:53 PM
Aliasing Sines |
|
 DFWBrysco
Male, 40-49, Eastern US
219 Posts
|
Thursday, August 02, 2012 2:30:47 PM
8Bit and Whodat are both correct - this is a matter of the camera as well as an optical illusion.
The stringed instrument family of violin, viola, bass and cello are strung at approximately 1600 lbs of pressure per square inch, resonating at 200hz to 3.5khz for violin, 125hz to 1.5khz for viola, 63hz to 630hz for cello and 40hz to 200hz for bass.
At these frequencies, it is impossible to follow the actual movement of the string without a Phantom camera, for the most part, but still - awesome video.
And yes - I was a music nerd playing these instruments for 35 years...  |
|
 whodat6484
Male, 30-39, Eastern US
2371 Posts
|
Thursday, August 02, 2012 11:44:43 AM
Pretty much all stringed instruments do that, you just can't see it with the naked eye because it's vibrating so fast. This reminds me of the video for Pantera's "5 Minutes Alone" |
|
 Mikeoxsbiggg
Male, 30-39, Canada
749 Posts
|
Thursday, August 02, 2012 10:13:07 AM
8BitHero is right. They vibrate really fast so it's just an optical illusion. You normally don't see it because you have to get close and have a lighter more distant background. Any stringed instrument will do this. A violin you might not see wobbles as much vs an upright bass. |
|
 edana42
Female, 40-49, Eastern US
2408 Posts
|
Thursday, August 02, 2012 9:38:26 AM
Ooops.. thought you meant this:
 |
|
Ilikelogic
Male, 40-49, Europe
303 Posts
|
Thursday, August 02, 2012 9:29:40 AM
Don't know enough about wavelengths on string instruments, but i would think it's a question of the scanning rate of the camera creating this illusion, so i go with 8BitHero |
|
 5Cats
Male, 40-49, Canada
17458 Posts
|
Thursday, August 02, 2012 9:10:16 AM
I had NO IDEA they did that! I thought there was just one big wobble from top to bottom, not a bunch of little wobbles along the way... |
|
 8BitHero
Male, 18-29, Europe
5420 Posts
|
Thursday, August 02, 2012 8:31:35 AM
And then I-A-B shines...
It doesn't actually wobble, it's more of an optical illusion |
|
 fancylad
Male, 30-39, Western US
2514 Posts
|
Thursday, August 02, 2012 7:22:26 AM
Link: What The Strings Of An Upright Bass Looks Like [Rate Link] - Whoa, wobbly! |
|
|
Back to Listing
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}
){kind=avatar}