Piezoelectric microphones - advantages

Discussion in 'Homework Help' started by boks, Nov 11, 2008.

  1. boks

    Thread Starter Active Member

    Oct 10, 2008
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    0
    What are the advantages of piezoelectric microphones? And are there any drawbacks compared to dynamic and capacitor mics?

    I know that it has a high impedance.

    Which of these inputs is needed?
     
    Last edited: Nov 11, 2008
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    I worked with audio for 47 years and have never seen a peizo microphone.
    Pros use dynamic, condenser or ribbon mics and toys and consumer products use electret mics.
    A "crystal" mic might be the same as a piezo mic and was used long ago with tube amplifiers. I had a crystal mic 50 years ago.

    Most piezo transducers have many sharp resonances and nulls in their frequency response.
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    They're waterproof and pressure tolerant, so they get used by marine biologists.

    And yes, the auld crystal mics for the auld high-input-impedance tube amps were indeed piezoelectric.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    So were the crystal phono pickups that ruined many a 45. They didn't even need a special preamp.
     
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