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What's quality factor in oscillation ?

  1. Jan 5, 2010 #1
    What's "quality factor" in oscillation ?

    I want to know why and how it was defined ?

    Is it useful in some ways ?
     
  2. jcsd
  3. Jan 5, 2010 #2

    f95toli

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    Re: What's "quality factor" in oscillation ?

    Quality factor ("Q") is only useful for damped oscillations; it is basically measure of how long it takes for the oscillation to die out or -equivalently- how narrow the oscillation is in frequency space (e.g a very "selective" filter has a high Q value).

    have a look at this page
    http://www.fonema.se/qval/qval.htm

    And yes, it is used a lot.
     
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