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In Reply to: RE: excitation posted by unclestu on April 11, 2011 at 12:30:30
"Excitation of the atoms are generally regarded as being part of the piezo effect."
As I just got through saying the other day, the piezo effect is regarded to involve the *deformation* of the crystal, the old squeeze/voltage thing, remember? The voltage is proportional to the squeeze/deformation, remember? Hel-looooo!!
"The laws of thermodynamics impose a conservation of energy. You can transform the energy but you can not eliminate them.
Well, DUH! - is there an echo in here? I just got finished saying that.
"I believe we are using the crystals to take the absorbed energy and convert them into heat through motion."
Geez, Luis, I just got finished saying that, too..
Seems odd you're commenting on things you haven't tried, I thought that was against your principles or something. Anyhow, crystals are actually outstanding for dissipation of mechanical and acoustic energy - out in the room - due to their physical characteristics. That's why SteinMusic, Acoustic Revive and yours truly are using them for controlling room acoustics, among other things. You're simply making (Geez, another) Strawman argument by comparing crystals to diffusers, mass dampeners, room dampers and such. You DO know what a Strawman Argument is by now, don't you??!!!!
"Check out the new Verizon Hall in Philadelphia: they make extensive use of woods to break up reflections and to dampen sound. You don't see them using crystals in their acoustic design."
Pity Verizon Hall doesn't use crystals. But not too surprizing, even most audiophiles don't use crystals. These things take time to work their way into the Acoustical Society of America and AES old school types. LOL
Same goes for your statement, "No musical instrument I know of uses crystals to generate their sound, which says a lot about the use of crystals to control acoustic modulation." Yup, you guessed it folks, another Strawman Argument!
Follow Ups:
Look up piezo electricity in almost any manual. Application of a voltage, and it does not have to be a direct voltage, but also a EMI field, generates crystal motion. A controlled direct voltage will generate a steady vibrational frequency when applied to a specific shape. Random sized crystals and varying fields have a much more varying effect.
After this, I will no longer attempt to define the piezo effect any further, at least not with you. As Bart points out, your ideas are so firmly fixed you do not see any further beyond the dogma you preach.
I have already stated that anything in a sound room will affect the acoustical properties,(Hello, are you reading?). Crystals are not the most effective, in my experience, at controlling acoustical vibration, and believe me I have some 15 pounds of various quartz based crystals of different sizes, even jewelry findings which are faceted. You are jumping to conclusions that I have not experimented with them. I have tried all the objects I have listed and even have had your Brilliant Pebbles Jars.
Sorry, yours were the least effective.
Of course YMMV, but then again I don't smake them either.
Stu
You did not have the instructions for Brilliant Pebbles - so I'm not surprised they were not effective for you. As we saw from Carcass' post the wrong location can hurt the sound. So, ya see, you can;t just place the crystals willy-nilly around the room, you need to have a plan. LOLI suspect you're confusing flexing/vibrating of the crystal itself with the atomic motion I've proposed.
Good luck with all your Strawmen, I know you'll be very happy. LOL
Edits: 04/11/11
I got a brand new unopened package. Even talked with you at the time although you may not remember.
Stu
You're obviously "bluffing." The instructions do not come with the "brand new unopened package" of Brilliant Pebbles.
That is SO funny. Oh, well, better luck next time. LOL
what legitimate manufacturer would supply a product without recommendations of placement or use? I distinctly remember a sheet of recommendation for placement that my friend gave me. I also played around with the BP at CES in a booth with some bookshelf speakers. Over all assessment, including those of the people in the booth, was negligible with over half not hearing a difference worthy of the price tag.
Stu
Why should anyone care about the "assessment" by you and guys in the booth at CES think? A booth at CES? Gimme a break. LOL
Edits: 04/12/11
you were the one who dropped it off.
LOL
Stu
Dropped what off where? I never dropped anything off at any booth at CES. Booths are too, uh, disembodied. I make it a point to stick with big important systems.
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