Normally, orderly waves of electric activity pass through the cardiac tissue, causing the heart muscle to contract.
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Inside its microphones is a capsule containing a diaphragm that vibrates near-perfectly when converting sound-waves into electric impulses.
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That conundrum was solved by getting the high-frequency signals to penetrate deeper using alternating waves of electric and magnetic fields.
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He has people working to develop a drone the size of a hummingbird and others working on an electric generator powered by ocean waves.
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Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.
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Electric currents could convey sound along a wire if they undulated in accordance with the sound waves.
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