REMOTE INTERACTIVE VOICE TRANSMITTER-RECEIVER

摘要

PURPOSE:To attain the communication even in a space other than air of cosmetic space or in water by providing a transmission section converting a voice signal into an FM signal and sending an optical FM signal and a reception section demodulating the optical FM signal into an audible signal to be an audible sound. CONSTITUTION:The microphone 11 of a transmission section 10 converts the voice generated by itself into an electric signal and an FM modulator 12 FM- modulates the output. A reference frequency generator 13 generates a carrier used for FM modulation and a transmission electrooptical converter 14 is drive by the output of the modulator 12. Then the converter 14 is constituted of a laser diode generating an optical FM signal or a light emitting diode, etc. A reception section 20 uses a reception photoelectric converter 21 to convert the optical FM signal from an interactive opposite party into an electric signal. The electric signal is detected by an FM demodulator 22 to form an audible electric signal and the audible electric signal is converted into an audible sound signal by an acoustic generator 23. Since the voice of a talker is transmitted in space as the optical FM signal, the communication is attained even in the space except in water or cosmic space.