humming points trivia

[Brian Newman]

I want to see people guess before giving a link to an answer. Why do points sing?

[rumplephorskin]

Is it because of moisture in the tube that is bordering its boiling point ?

[oosiris]

I haven't witnessed this yet but after I pull a point, pop the hole and ream it out I can then give it a quick blow of air and make a flame shoot out.

[chayes]

if it aint humming ya aint doing it right. They sing to the goddes oberlon, the goddess of melting stuff. Because back in greek days the blowers had to pray to the gods. And a great tragedy struck one day and ever since points have sung to the heavens.

[Greymatter Glass]

mmmm expanding air + vibrating molecules of gradiently heated glass resonating down a long tube.... seems like it should hum if it's tuned right....

so what is it?

-Doug

[Firekist]

moisture vaporizing and condensing within the tube causing a resonance within the tube.. that's always been my guess.

z--seth

[Brian Newman]

Doug wins. Search the terms "thermoacoustics" and "sondhauss oscillations" to learn more. Or start here. (http://www.lanl.gov/projects/thermoacoustics/)

[mistahead]

ahhh.. that sounds like ninja talk to me!!

[Greymatter Glass]

sweeeeeet

I'm gonna make me a stirling 'fridge.

My Stirling Engine kinda worked...maybe this will fail totally!

[Brian Newman]

Ben and Jerry's put in a sonic fridge in 2004

[burnoutboy]

what a great thread, Brian!!
this is really cool.

thanks

[Greymatter Glass]

Ben and Jerry's put in a sonic fridge in 2004

No, I mean one that cools with sound, not one that sounds cool.



j/k... but really what do they need a cryogenic freezer for? making ice cream?

[Brian Newman]

They are big into environmentalism. A sonic freezer dosen't use freon or C.F.C.'s, just sound.

[Brian Newman]

If no one else is going to make the joke...

Sonic fridge? sounds cool!

[Julian]

I always thought it was just humming because air was blowing out of the end as the air expanded due to the heat.
I used to beexcited when I got a piece that was humming.. they always seemed to be the more symmetrical pieces.
I had no idea about sonic refrigerators or anything! Great link. So THATS what they do at Los Alamos...

[coil1002]

sweeeeeet

I'm gonna make me a stirling 'fridge.

My Stirling Engine kinda worked...maybe this will fail totally!


Back when I went to refrigeration school we built a small prototype It was fun

[Firekist]

too lazy to google.. explain sonic fridge.
thanks =)

z00-seth

[smutboy420]

No, I mean one that cools with sound, not one that sounds cool.


too lazy to google.. explain sonic fridge.
thanks =)

There is a place near by were I live that has an experimental air condishoner that uses sound as its means of cooling.

It uses a weird coiled heat sink and some how has a lazer that hits the heat sink and causes it to vibrate. Some how the vibration makes the sound and the heat move in one direction on the heat sink and it cause it to dump all kind of heat on one side of the system and cools the other side of the system.


I know you can also heat with sound waves. Infact new theroies say that the reason the sun is so hot on its surface is because of the sound of the sun its self is so loud it produces most of the heat. it would make sence as its the loudest thing in our universe.

[ShttrdSpctrm]

yesterday I was playin with the song. I was gettin the humming everytime I took my piece outta the flame.

[Mac Maestro]

I can both heat and cool just with vibrations from my voice.

I also think it would be totaly cool to hear the sun.

[nickglassdood]

dood i been listening for the sun all night ........i think i here sumthin could be sleep deprevation tho, its overcast now too

[Mike_Aurelius]

Heat, sound, light -- all parts of the same thing: the electromagnetic spectrum. Throw a little gravity into the mix and you have a star...although I will comment that our sun probably isn't the loudest thing in the universe being that it is such a small star in comparison to some.......the loudest thing in the history of the universe was the 'Big Bang'.

[Brian Newman]

the loudest thing in the history of the universe was the 'Big Bang'.

If space is four dimensional, then the big bang never happened. Picture a sphere. Map a cross section of it, and you have a circle. Map it along the ignored third dimension, and the circle gets smaller quite drastically just before it disappears. Same thing happens when you map a four dimensional universe in three, and then extrapolate along the fourth dimension. Time and space are not seperate, and the big bang is more akin to an event horison or warping of scale on a flat map of the world than an actual explosion. Granted, the universe CAN be a noisy place.

[hippieandrew]

so can my bathroom.

[smutboy420]

woops when I said universe I meant solar system.