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Thread: Noise from scanned object?

  1. #1
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    Default Noise from scanned object?

    Anybody ever notice noise being emitted from where the scanned beam is terminated?
    http://img62.imageshack.us/img62/3985/laser.gif

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    The Health and Safety Act 1971

    Recklessly interfering with Darwins natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.





  2. #2
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    What kind of surface are you terminating on?

  3. #3
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    Quote Originally Posted by ElektroFreak View Post
    What kind of surface are you terminating on?
    It was terminating on a suede jacket.

    I've just captured the effect on my camcorder but the upload has failed 3 times.

    I'll upload it to Mediafire.
    http://img62.imageshack.us/img62/3985/laser.gif

    Doc's website

    The Health and Safety Act 1971

    Recklessly interfering with Darwins natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.





  4. #4
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    Default

    I was running the RGB and over the considerable fan noise I could hear a buzz from behind me.

    Recording
    http://img62.imageshack.us/img62/3985/laser.gif

    Doc's website

    The Health and Safety Act 1971

    Recklessly interfering with Darwins natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.





  5. #5
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    Radiation pressure? Its only thing i can think of.
    Is the noise same frequency as scanning frequency?

  6. #6
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    Sounds like the beam might be heating the surface a little whenever it touches the suede, making a little noise.

  7. #7
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    I would imagine that suede will expand when the water and air inside it gets heated.

  8. #8
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    If u have time, try it on different surfaces and report the changes of sound

  9. #9
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    Quote Originally Posted by Doc View Post
    Anybody ever notice noise being emitted from where the scanned beam is terminated?
    YES i had this with an asbestos door at which i scanned with a 7W RGB from 30 feet.
    This was really weird.. the surface wasn't getting noticeable warm or anything..

  10. #10
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    Black pelicases will buzz when scanned with 8w of 532 green.
    It sounds like a 'dry crackle' rather than a 'buzz'.
    I had always thought is was the plastic absorbing the light energy and expanding, then quickly contracting as the scanning spot moved on .
    B.

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