Tuning fork vibrations in super slow motion

http://video_demos.colostate.edu/

Super slow motion video filmed with a high-speed camera of a vibrating tuning fork being plunged into a bowl of milk.

The effects of sampling rate and aliasing are also discussed.

NOTE - the frequency C523.3 corresponds to the C an octave above middle C, not middle C.

More engineering and physics-related video demonstrations can be found here:

http://video_demos.colostate.edu/

Category:

Sports

Tags:

• tuning
• fork
• vibration
• physics
• frequency
• high
• speed
• milk
• ripples
• sampling
• rate
• Nyquist
• Shannon

[deltaray3]

Thanks. the beginning of your video was very effective for explaining to my 4 year old daughter what a tuning fork is.

[DrDaveBilliards]

@deltaray3

Thanks. That's the best compliment I've received in a while! It's not easy to please a 4-year old.

[gamehead91]

@DrDaveBilliards WHAT!?

[DrDaveBilliards]

@gamehead91

Is your exclamation/question in reference to the aliasing, or the mislabeling of middle C (see the video text description above)? Or is it something else?

[MrSnbryan]

actually 523,25 is C one 8ve above middle C40, known (in England) as C52 on a piano. Nicholas, Brazil.

[DrDaveBilliards]

@MrSnbryan

I actually have this info in the video description. I just said it wrong in the video.

Thanks.

[thawdani]

troll..science.

[catstuffer]

you need to use at least 4x AA for better picture :D

[MrSnbryan]

sorry...!

[DrDaveBilliards]

@rasmasyean

Very little happens at the contact point with the wood. There is very little motion because the tines are moving in a balanced fashion. Although, there is a slight fluctuation in force on the wood, which causes vibrations in the wood (which are too small to see with my camera).