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| Joined: | Sep 22nd, 2008 |
| Location: | Doylestown, Pennsylvania USA |
| Posts: | 130 |
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Experimenters interested in earth sounds have constructed receivers to pick up ambient waves in the audio frequencies. Power line fields interfere with reception and designs have input filters aimed at the suppression of power line signals and harmonics. I consider these designs in the same category as EMF recorder setups.
The earth sounds people have heard singing and voices with these devices.
Joe
Last edited on Dec 17th, 2009 02:46 PM by joecioppi