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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Ah, but what about...... posted by Jon Risch on April 9, 2011 at 19:22:39:
"... the mass of the crystal?Any vibration impinging on the crystal that can not make it move as a whole DUE TO IT'S OWN MASS, will tend to flex the crystal, rather than move it as a whole.
These would be primarily higher frequencies, including RFI/EMI frequencies.
Thus, above the mass inertia point of any given crystal IT IS vibrating internally (not moving in unison or as a whole). If piezoelectricity being damped is the working mechanism, then it could come into play above that mass inertia point. "
..........................................................................
If the atoms' motion inside a free-standing crystal is absorbing mechanical vibration - the speed and distance of travel of the atoms are proportional to the force of vibration - then larger vibrational forces will only make the atoms move faster and farther along their lines of motion, i.e., conservation of energy.
For any size crystal, even a large one, larger forces of vibration will excite the atoms to move faster and farther along their lines of motion, heating the crystal further. The atoms act like they are attched by springs and return to their rest position during the back and forth cycle due to binding forces. So, flexing or distortion of the crystal is not necessary in order to dissipate the mechanical energy, even when the energy is high or the size of the crystal is large. The motion and mass of the atoms is sufficient.
GK
Edits: 04/11/11
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Follow Ups
- RE: Ah, but what about...... - geoffkait 06:25:38 04/10/11 (11)
- excitation - unclestu 12:30:30 04/11/11 (10)
- Actually, you're wrong - geoffkait 13:06:45 04/11/11 (8)
- : Actually, you're wrong - unclestu 13:56:53 04/11/11 (7)
- RE: : Actually, you're wrong - geoffkait 14:07:12 04/11/11 (6)
- you're wrong - unclestu 16:48:15 04/11/11 (5)
- Sorry - geoffkait 17:05:34 04/11/11 (4)
- Well then - unclestu 17:54:37 04/11/11 (3)
- Question - geoffkait 18:21:31 04/11/11 (2)
- Aparently - unclestu 15:16:19 04/12/11 (1)
- The plot thickens - geoffkait 15:57:46 04/12/11 (0)
- I should - unclestu 12:32:14 04/11/11 (0)
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