Patent ID: 6993140

Claim:
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 — comprising an external source audio input terminal, said second circuit system demodulator circuit and said third circuit system audio input terminal being coupled to said phase detecting U-circuits in said first circuit system and to said speakers.