Headphone apparatus

Details Headphone apparatus Headphone apparatus

1998-01-15

1999-03-23

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Binaural and stereophonic

Stereo speaker arrangement

381 74, 381309, H04R 110

Patent

active

058870660

ABSTRACT:
A headphone apparatus includes a plurality of antennas for receiving an FM signal produced by FM-modulating a carrier signal with an audio signal, a plurality of tuning circuits for receiving reception signals of the plurality of antennas, a mixer circuit for causing tuning coils of the tuning circuits to be transformer-coupled to each other and for frequency-converting an output signal of one tuning circuit into an intermediate frequency signal, an FM demodulating circuit for FM-demodulating the intermediate frequency signal to produce the audio signal, and an acoustic unit for converting this audio signal into a sound. The directivity axes of the antennas are arranged perpendicularly thereby improving the reception of this headphone apparatus.

REFERENCES:
patent: 4845751 (1989-07-01), Schwab
patent: 5247293 (1993-09-01), Nakagawa
patent: 5361381 (1994-11-01), Short

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