Tweakers' Asylum

RE: I knew you would say that, we were talking about E-fields, not squeezing...

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geoffkait

In Reply to: RE: I knew you would say that, we were talking about E-fields, not squeezing... posted by rick_m on August 27, 2007 at 11:31:13

The electromagnetic field I am referring to is the EMI/RFI that Unclestu claims is *absorbed* by the quartz crystal. The electric field you are referring to (I hope I'm not putting words in your mouth) is the result of squeezing the crystal mechanically -- an electric charge or field or voltage. I.e., the piezoelectric effect.

Follow Ups:

RE: I knew you would say that, we were talking about E-fields, not squeezing... - rick_m 12:59:52 08/27/07 (3)
"The electromagnetic field I am referring to is the EMI/RFI that Unclestu claims is *absorbed* by the quartz crystal. The electric field you are referring to (I hope I'm not putting words in your mouth) is the result of squeezing the crystal mechanically -- an electric charge or field or voltage. I.e., the piezoelectric effect."

They're the same thing, just in reverse. Think of old ceramic phono cartridges (Motion > Electricity), think of ceramic piezo tweeters (Electricity > Motion).

Rick
- RE: I knew you would say that, we were talking about E-fields, not squeezing... - geoffkait 15:13:54 08/27/07 (2)
  Let me get this straight. You're saying that if the piezoelectric effect explains why a voltage is produced when a crystal is squeezed, then the inverse piezoelectric effect must be the explanation for EMI/RFI absorption in a crystal? That is one big strawman argument you got hanging out there, Rick.
  Geoff
  
  Edits: 08/27/07 08/27/07
  - Nope, didn't say that... - rick_m 17:20:37 08/27/07 (1)
    But I did say that I think it may be true in the case that Stu described, which makes it interesting indeed.
    
    By the way, having received your deleted post I looked up strawman argument to make sure that I understood it. Thank you for providing me with what I reckon is an example.
    
    If there is even a possibility that this works I am interested in learning more about it, that's all.
    
    Don't know it all...yet.
    
    Rick
    - RE: Nope, didn't say that... - geoffkait 17:42:26 08/27/07 (0)
      I agree, what works works, explanation optional. I wrote my paper on crystals for audio applications about 6 years ago for my own entertainment.
      
      Geoff

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