Half a croissant, on a plate, with a sign in front of it saying '50c'
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Ultrasonic oven

Works for industry so should work for domestic use.
  [vote for,

Ultrasonic heating is used in industry for heating material localy.

I'm proposing to use ultrasonic waves instead of microwaves for the home oven. Its safer for humans. Will only disturb critters. Should be ultra to pet's sonic, and should not be confined to inside the "oven", so even safe for the bats.

pashute, Mar 20 2006

(?) Ultrasonic plastic welding http://www.staplaul.../c2-ultra/ultra.htm
More info [ConsulFlaminicus, Mar 21 2006]

(?) Ultrasonic Welding http://www.joiningt.../Library/UW/uw.html
Better info and graphics [ConsulFlaminicus, Mar 21 2006]

how sonic heating works http://ci.nii.ac.jp/naid/110002359321/en/
A scientific article about how it works. [pashute, Oct 21 2007]


       Only reference I could find was to using ultrasound to keep a steam mix homogenous for making good crusts on bread. You sure this technology exists?
DrCurry, Mar 20 2006

       //for making good crusrts on bread//   

       Is crusrts like custard?
DesertFox, Mar 20 2006

       Ultra sonic for domestic pets, but painful and dangerous for non-domestic pets - i.e. rodents, cockroaches, etc.   

       Cook and kill!
Asinine, Mar 21 2006

       Was shown one at a fab a month or two ago. Heats locally, (high temp) used for mini-imprinting and for welding.
pashute, Mar 21 2006

       Sonication is used extensively in the laboratory world for cleaning and for sonic disruption of cells and thourough mixing of solutions. Also used to degas solutions for certian types of analysis. You might produce VERY localized areas of heating but this is generally due to the shredding of whatever is being sonicated and the resulting friction Otherwise heating is not something that this process does very well at all. i just dont see this working at all. Sonicators already exist for home use in the applications that the technology is applicable. Other heating technologies are far more efficient and effective. And they dont turn your hamburger into mush.
jhomrighaus, Mar 21 2006

       /And they dont turn your hamburger into mush./   

       Whas iz I non't ave any meeh?   

       Translation: What if I don't have any teeth?
NotTheSharpestSpoon, Mar 21 2006

       Sorry but your wrong. [jhom] will delete until I find the proof, then re-post...
pashute, Mar 21 2006

       //Should be ultra to pet's sonic, and should not be confined to inside the "oven"// Any energy source sufficiently powerful to cook food (or other organic matter, like, say, humans) absolutely *should* be confined to the oven. [-]
coprocephalous, Mar 21 2006

       I look forward to seeig anything that you find. Always interested to learn new things ;-)
jhomrighaus, Mar 21 2006

       I use a 20kHz sonicator for lab use. It can heat the hell out of very small viscous solutions. If you want to heat small amounts of ice cream or custard, this would be ideal. [-]
daseva, Mar 21 2006

       I've heard of sonic cooling, but is sonic heating possible?
jellydoughnut, Mar 25 2006

       GumBob could you give a source? (link or name of manufacturer) Thanks!
pashute, Mar 31 2006

       Finally a link after some years. Why all the fishbones? Can somebody who fishboned explain what they don't like about the idea? Its fairly simple. Since in the lab you use a sonicator for miniscule and local sonic heating, why not use the same principle, but in large scale, for heating regular soup, or a plate of pasta? Its probably safer than microwave.
pashute, Oct 21 2007

       I'm made all the more curious by the phrase //strong, harmless magnetic field //.   

Custardguts, Oct 21 2007

       If you see ultrasonic humidifiers, ultrasonic waves convert water into cool mist without actually heating it.
VJW, Mar 28 2011

       Ultrasonic welding is actually friction heating at the contact surface. As such it is relatively efficient.   

       Using ultrasonics to try to heat something generally will be less efficient, becuase you're using induced internal friction, which is going to be less for a given energy input. Regardless of that, you'll only skin heat, because the sound won't penetrate. This might work for liquids, because the induced motion causing the friction will also mix it. It won't work well for solid foods.   

       And ultrasonic humidifiers work by shaking the water to cause it to spray into the air. This would be much higher energy, and probably higher frequency.   

       Of course if you go high enough, then the whole buble fusion thing comes into play if that actually works.
MechE, Mar 28 2011

       I agree with [jhom] and [MechE]. I've heard of ultrasonic welders (which basically rub two bits of stuff together until they melt), and we use ultrasonicators in the lab (as others have described) on various suspensions and solutions. In the latter case, there is some heating, but not a lot, considering the amount of energy being put in. I'm not saying it won't heat your food, I just don't think it will be very efficient, at least from what I've seen.   

       (The paper in the third link talks about using frequencies of a few 10s of kHz, which is what we use in the lab. I'm not sure of the heating efficiencies of much much higher frequencies.)
MaxwellBuchanan, Mar 28 2011

       I'm not sure of the effectiveness. Next time you put your head inside a turkey, try to listen to what's going on around you. You'll find the external sound quite attenuated.
FlyingToaster, Mar 28 2011

       And yet, ipse quandam nul quontam, I can hear my stomach gurgling quite easily. So how does that work?
MaxwellBuchanan, Mar 28 2011

       I think were you to pull yourself inside out you'd find the sound both louder and with a much greater high frequency component.
FlyingToaster, Mar 28 2011

       I had a supplier who melted two components together for us with ultrasonics.WOW, WAS THAT EVER FREAKING LOUD AND ANNOYING TO VISIT THAT PLANT !
normzone, Mar 28 2011

       // Next time you put your head inside a turkey //   

8th of 7, Mar 28 2011

       So you don't like the idea because you think it won't work? That's not a reason to bone a halfbaked idea.
pashute, Mar 29 2011


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