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Hook up a few loops of speaker wire into a necklace. Connect the wires to the audio port of a cell phone, stick a tiny magnet in the ear canal. The small audio
by iwwr 16y ago
Hook up a few loops of speaker wire into a necklace. Connect the wires to the audio port of a cell phone, stick a tiny magnet in the ear canal. The small audio current will cause the magnet to vibrate and transmit sound. This has been used for cheating on exams for a number of years.
- Luc 16y agoWell, theoretically. I've tried this with an amplifier and the signal is still weak and unreliable. The magnet needs to lie against your eardrum to get a good signal and the sound is very thin. I'd be impressed if someone has ever used this method successfully during an exam (even solving the reception problem, you'd still need to have a way to get the correct information played back).