Patent ID: 6993140
Filing Date: 2006-01-31
Classification: G10K,H04R

Abstract:
1. A wireless 3-in-1 anti-noise, radio, and sound-collecting device comprising: a headphone structure having right and left ear cover speakers, a head band interconnecting said speakers, and a PCB installed in said headphone structure; said PCB having first, second and third circuit systems therein; said first circuit system being an anti-noise circuit comprising a microphone for detecting noise, phase detection U-circuits coupled to said microphone and to each speaker and means for emitting a sound wave of opposite phase to said noise, coupled to said speakers; said second circuit system being a radio circuit system comprising an am/fm receiver, a U-circuit IC, a down converter circuit, a detect circuit, and a demodulator circuit; said third circuit system being a sound collection circuit system