Interesting effects of sound waves:...

bcheary Loc: Jacksonville, FL

http://vimeo.com/111593305?email_id=ZGFpbHlfZGlnZXN0fDMzNGI2NDE5ODU5MDM3MjYyOGIwOWMwYmI0NzhjNmIzNzc5fDIzMzAwMDgzfDE0MTU5ODE1MTR8OTI3OQ%3D%3D&utm_campaign=9279&utm_medium=vimeo-digest-daily_digest-20140100&utm_source=email

Bultaco Loc: Aiken, SC

Cool

nairiam Loc: Bonnie Scotland

Very interesting. :thumbup: :thumbup: :thumbup:

richosob Loc: Lambertville, MI

bcheary wrote:

http://vimeo.com/111593305?email_id=ZGFpbHlfZGlnZXN0fDMzNGI2NDE5ODU5MDM3MjYyOGIwOWMwYmI0NzhjNmIzNzc5fDIzMzAwMDgzfDE0MTU5ODE1MTR8OTI3OQ%3D%3D&utm_campaign=9279&utm_medium=vimeo-digest-daily_digest-20140100&utm_source=email

That was cool, way to go bc.

bcheary Loc: Jacksonville, FL

Bultaco wrote:

Cool

:thumbup: :thumbup: :-D

bcheary Loc: Jacksonville, FL

nairiam wrote:

Very interesting. :thumbup: :thumbup: :thumbup:

Thanks Nairiam. :-D

bcheary Loc: Jacksonville, FL

richosob wrote:

That was cool, way to go bc.

Thank you Rich. :-D

GeorgeH Loc: Jonesboro, GA

Good stuff! Here's a way to play with that sort of thing. Next time you have a cuppa coffee in a foam cup, try sliding it slowly across a Formica counter/tabletop with a gentle downward pressure. With a little practice you can get sort of a "moan" sound from the cup, and the surface of the coffee will show a wave sort of pattern. It's quite possible to force the waves to generate droplets which may have enough energy to leap out of the cup.

Really entertaining; kids love it.

What I think is happening is that the vibration of the cup's wall sets up standing waves in the liquid, which either cancel each other or reinforce, hence the wave pattern. Troughs indicate cancellation, peaks reinforcement. Enough energy and the peaks throw off little droplets.

Now, since I like coffee that's what I use. The dark color makes it easy to see the effect. Carbonated drink? I don't know. I'd imagine that the ice would change the effect. In my experience only foam works.

Anyone else do these sorts of "silly" things while chillin' in McD's? :thumbup:

bcheary Loc: Jacksonville, FL

GeorgeH wrote:

Good stuff! Here's a way to play with that sort o... (show quote)

Thanks for your input George. I know how to make a glass sing by moistening your finger and running it around the edge of the glass. :-D

GeorgeH Loc: Jonesboro, GA

bcheary wrote:

Thanks for your input George. I know how to make a glass sing by moistening your finger and running it around the edge of the glass. :-D

Fun, isn't it? IIRC Ben Franklin invented the glass harmonica, and several pieces were composed for it. http://en.wikipedia.org/wiki/Glass_harmonica

What a genius Mr Franklin was!

bcheary Loc: Jacksonville, FL

GeorgeH wrote:

Fun, isn't it? IIRC Ben Franklin invented the glass harmonica, and several pieces were composed for it. http://en.wikipedia.org/wiki/Glass_harmonica

What a genius Mr Franklin was!

Thanks for that bit of info. :thumbup: :thumbup: :-D

wings42 Loc: San Diego, CA

bcheary wrote:

Thanks for your input George. I know how to make a glass sing by moistening your finger and running it around the edge of the glass. :-D

:thumbup: :thumbup: :thumbup: Almost irresistible when some blowhard is giving a speech at an event. Ben Franklin invented an instrument that works on this principle called a glass harmonica ( http://en.wikipedia.org/wiki/Glass_harmonica ). You can hear it on YouTube, or the related Glass Harp at https://www.youtube.com/watch?v=47TGXJoVhQ8 .

bcheary Loc: Jacksonville, FL

wings42 wrote:

:thumbup: :thumbup: :thumbup: Almost irresistible when some blowhard is giving a speech at an event. Ben Franklin invented an instrument that works on this principle called a glass harmonica ( http://en.wikipedia.org/wiki/Glass_harmonica ). You can hear it on YouTube, or the related Glass Harp at http://www.youtube.com/watch?v=47TGXJoVhQ8 .

Thanks Wings. (remember to take the s off https for the link to work)

:-D

GeorgeH Loc: Jonesboro, GA

wings42 wrote:

:thumbup: :thumbup: :thumbup: Almost irresistible when some blowhard is giving a speech at an event. Ben Franklin invented an instrument that works on this principle called a glass harmonica ( http://en.wikipedia.org/wiki/Glass_harmonica ). You can hear it on YouTube, or the related Glass Harp at https://www.youtube.com/watch?v=47TGXJoVhQ8 .

:thumbup: :thumbup: :thumbup:

raymondh Loc: Walker, MI

FASCINATING!!