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<blockquote data-quote="Ded Driver" data-source="post: 509150" data-attributes="member: 12692"><p>low frequencies, ie as per VLF detectors in kHz, propagate ok under water for the distance required, but the higher the frequency, the more the signal is attenuated.</p><p>That means your hi-freq signal for headphones (Bluetooth 2.45GHz) will not travel very well at all .. as good as no propagation.</p><p>This is why submarines (& whales) use ultrasound .. very very low frequency</p></blockquote><p></p>
[QUOTE="Ded Driver, post: 509150, member: 12692"] low frequencies, ie as per VLF detectors in kHz, propagate ok under water for the distance required, but the higher the frequency, the more the signal is attenuated. That means your hi-freq signal for headphones (Bluetooth 2.45GHz) will not travel very well at all .. as good as no propagation. This is why submarines (& whales) use ultrasound .. very very low frequency [/QUOTE]
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Metal Detectors
Detector Accessories
Waterproof in ear headphones
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