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MightyRoops t1_j8rz9d7 wrote

Reply to comment by 35Lcrowww in This electric toothbrush plays “Survivor” by Destiny’s Child while you brush your teeth by pervertedgiant

Those tooth brushes played music through bone conduction - it sent vibrations through your teeth, your skull and then your inner ear.
If you want bone conduction with a beard trimmer you'd have to press it against your face so hard that you won't have any cheeks left at the end of the song

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