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Thread: Varroa Sound

  1. #11

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    This information came via the local association, I assume the originators sent out a mail shot.
    Discs are passé.
    Discounts are available for early orders and even bigger discounts for group orders.
    I still can't afford one!

  2. #12
    Senior Member Greengage's Avatar
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    I was telling some of the beekeepers about this sound idea last night and the told me it was nothing new and to look up the late Eddie F. Woods who invented The Apidictor and patented, and marketed it in the 1960s. So i did and came across these articles even one to build your own.
    http://www.beehacker.com/wp/?page_id=103
    http://beesource.com/build-it-yourself/apidictor/

  3. #13
    Administrator gavin's Avatar
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    Quote Originally Posted by Greengage View Post
    I was telling some of the beekeepers about this sound idea last night and the told me it was nothing new and to look up the late Eddie F. Woods who invented The Apidictor and patented, and marketed it in the 1960s. So i did and came across these articles even one to build your own.
    http://www.beehacker.com/wp/?page_id=103
    http://beesource.com/build-it-yourself/apidictor/
    That very small DARG study by Richard Ball (ex head of the inspectors south of the border) is compatible with the bee gym working as advertised. However one hive with a bee gym and one control isn't nearly enough.

    The Apidictor listens in (and seems to work) whereas the Varroa control thing blasts them with sound. The Apidictor filters out the sound of several thousand young bees getting ready to fly off with the swarm. Swarms have many young bees in them and this preparation of young bees to fly is characteristic of colonies approaching swarming.

  4. #14

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    http://www.ohmslawcalculator.com/555-astable-calculator
    http://www.ohmslawcalculator.com/e24-resistor-sizes
    http://www.ohmslawcalculator.com/555-astable-calculator -- work out the values you need

    Just use the above to adjust the values for this little project
    Resistors and capacitors are only available in certain values hence the tables

    http://www.instructables.com/id/555-...e-The-Circuit/

    The authors circuit is for a much higher frequency so you don't need a piezo buzzer just a small speaker
    Also you will be able to hear it or at least a younger person will be able to so no fancy measuring tools required

    The decibel requirement of 90db ?
    You would need an audio amplifier as well as the frequency generator above
    "a pneumatic road drill 3 metres ways is about 90 dBa"
    Since 15Khz is in the normal hearing range I don't think that the neighbours will like the idea much
    Last edited by The Drone Ranger; 28-01-2017 at 03:11 PM.

  5. #15
    Administrator gavin's Avatar
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    Quote Originally Posted by The Drone Ranger View Post
    You would need an audio amplifier as well as the frequency generator above
    "a pneumatic road drill 3 metres ways is about 90 dBa"
    Since 15Khz is in the normal hearing range I don't think that the neighbours will like the idea much
    Unless they are old, like me, and have a hearing range well below 15kHz.

    Sounds like a nasty thing to do to a bee colony and possibly dangerous for the beekeepers too.

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