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Whisphone: Whisper-Input Earbuds via In-Canal Bone Conduction

A canal-type earbud with the microphone at the earplug tip that captures whispered speech radiated into the sealed ear canal by bone conduction, exploiting the occlusion effect to boost whisper volume and active noise cancellation to reject ambient noise up to 80 dB(A), enabling discreet hands-free speech input to AI assistants.