They use this for tuning violin plates before they get glued on to the ribs. They are called chladni patterns.
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Using grains of rice for port tuning???
- Thread starter gtirard
- Start date
I hope the rice is cooked first.
Same with many guitar luthiers.
i did it with some unpopped popcorn and a sine wave generator on my phone fed to a power amp fed to my speaker cab, worked just fine and nicely confirmed that my amateur calculations on winISD matched up with my real world results, at the frequency i was supposed to have the popcorn did indeed stop bouncing around
popcorn kernels are easier to clean up than rice or especially sand afterwards
popcorn kernels are easier to clean up than rice or especially sand afterwards
- Feb 12, 2006
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- Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
Many luthiers use Christmas glitter instead od rice. It has very low mass.
Oy, that stuff can make for quite a mess that takes a long time to get rid of.
She half Chinese. She know's what she's doin… most of the time.I hope the rice is cooked first.
That was my first thought -- plus, it's metallic and possibly even electrically conductive. It wouldn't take long for some of that stuff to end up somewhere it shouldn't, IMO. Like in the gap of a voice coil motor, for instance.
Room mic'ing might be a viable approach when recording - it'll be a crapshoot as to whether or not the results are usable. I would never attempt in in a live setting - too many things to go wrong, and not enough time to troubleshoot it if it doesn't work.
If you want to mic both the port and the cone, go ahead. It will never be as good as a DI - the speaker doesn't have as extended response at low frequencies. You also have proximity effect, which, if you're close miking the port, will be considerable - there a lots of ways that close miking a port can go sideways. But if you like what you hear, go ahead. Again, I would never do this in a live setting - only recording.
When I have had people insist that I mic their cabinet, I've used a DI as the basis of the sound (to get decent low end) and mixed in the mic at higher frequencies (500Hz and above) to get some character from the cabinet. That seems to work well.
The food cooking and allergic to alcohol one.
I have a waterproof speaker that I cover with water then do a frequency sweep for science class.
The kids love seeing how the water bubbles and dances like a fountain at the lower frequencies, then make neat shapes and patterns in the higher.
Being half Greek, I might try orzo if ever ...
... the other half being Irish, I might try ... stale soda bread crumbs?
