Bone Conduction

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Bone conduction is the transmission of sound to the inner ear through the bones of the skull. Because the skull conducts low frequencies better than air, people perceive their own voices to be lower and deeper than others do. Bone conduction is ears-free, thus providing extended use comfort and safety, has high sound clarity in very noisy environments, and can be used with hearing protection.

However, some implementations require more power than headphones, and the overall clarity is not on par with traditional headphones and microphone due to reduced frequency bandwidth. One example of a bone conduction speaker is a piezo-electric flexing disc about 40mm across and 6mm thick used by scuba divers. Bone conduction transmission is also useful for individuals with impaired hearing.

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