DIY Parabolic Laser Mic. .. HELP !!! - diyAudio
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Old 25th March 2010, 05:54 AM   #1
Kurnai is offline Kurnai  Australia
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Join Date: Mar 2010
Default DIY Parabolic Laser Mic. .. HELP !!!

Hi All,
Probably the stupidest question you have been asked, (Before you comment/Ask ..) Female Yes ...Blond, of Course ..

OK, (THAT'S out of the way) ... DIY Parabolic Mic, .. Do you have to Always be on a reasonably horizontal plane to reflect the laser back to the "Sweet" spot (Mic) on the dish ??,or can you angle the laser beam ..
IF this is possible could someone PLEASE explain to me the procedure to get a angled laser back to the Mic, ..
WHY, Cause I would like to get some audio of an Eagle (plus other wildlife) but the closest I can (ever) get to the Eagles is 'bout 50metres, & then they are up a tree, anywhere from 5-50metres up.

Thanks.
Jody.
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Old 29th March 2010, 04:29 PM   #2
ermine is offline ermine  United Kingdom
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Join Date: Aug 2007
WTF? why would you need a parabolic dish for a LASER mic?

Are you using a parabolic dish to focus the sound on a regular microphone, along the lines of this article

Or are you really trying to do a CIA job of bouncing lasers off of windows. All sorts of questions spring to mind. Why are eagles near windows? etc etc

I've used a regular parabolic mic. You place mic in the focus of the dish, which can be found using it to reflect a bright object (NOT the sun) onto a piece of paper from the residual reflection from the dish. Or you use the manufacturer's spec, or you buy an all in one rig such as a Telinga

You listen to the mic through headphones, point dish straight at sound source, peak the signal on it and hit record. No lasers needed. You'll get a great recording for up to 20m, more than that depends on how noisy the environment is.

Perhaps I am being stupid today, but I just don't get the laser, what's up with that? Link or picture please
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Old 10th April 2010, 01:06 AM   #3
bill_a is offline bill_a  United States
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Join Date: Aug 2009
Location: Seattle
Ermine,
Kurnai has asked this question a number of times before on other parts of these forums. I, and many others, have tried to help her, but to no avail. Somehow, she's just off in left field or trying really hard to be difficult. Don't waste your time...
Bill
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