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Transducers in Musical Cards

Discussion in 'General Electronics Discussion' started by Raven Luni, Jul 10, 2013.

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  1. Raven Luni

    Raven Luni

    Oct 15, 2011
    Possibly one for the frankenstein thread but I was wondering about those piezo transducers you get in musical cards. What kind of frequency range are they capable of? Are they any good with ultrasound or are they just for playing shitty beep tunes?
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    First answer: I don't really know.

    On general principles, the larger a transducer is, the lower the frequency it can operate at.

    These are fairly small, but they are designed to have a peak response in the middle of the audio range.

    I expect they would have some response in the ultrasonic region, but it would be well past their peak.

    If you can find specs on similar transducers then you may be able to estimate the performance.
  3. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
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