birding-aus
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To: | "Tim Murphy" <>, "Birding-aus" <> |
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Subject: | Songfinder question |
From: | "michael norris" <> |
Date: | Sun, 10 Dec 2006 14:33:45 +1100 |
Bat detectors shift frequencies into the audible range with the cheapest
being about 100 Aussie dollars.
You can find the circuitry on the web.There's an opportunity here for an entrepreneur to modify them to shift bird song to lower frequencies. Michael Norris |
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