Songfinder question

To: "Tim Murphy" <>, "Birding-aus" <>
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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