Microphone and microphone system

Details Microphone and microphone system Microphone and microphone system

1992-08-04

1994-06-21

Hsu, Alpus H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359172, 359180, 381172, H04B 1000

Patent

active

053232577

ABSTRACT:
An infrared-ray cordless microphone including a modulator for modulating an acoustic-to-electric converted sound signal through a predetermined process; and an infrared-ray transmitter for transmitting an output infrared signal obtained by converting the modulated sound signal from the modulator; wherein the infrared-ray transmitter is disposed at a lower end of the microphone body. There is also provided an infrared-ray cordless microphone system comprising such a microphone and a sound output means which includes an infrared-ray receiver for receiving the infrared signal from the microphone, a demodulator for demodulating the received infrared signal, and an electric-to-acoustic converter for converting the demodulated signal into a sound signal.

REFERENCES:
patent: 4171902 (1979-10-01), Imai et al.
patent: 4187404 (1980-02-01), Deman et al.
patent: 4229829 (1980-10-01), Grunwald
patent: 4479265 (1984-10-01), Muscatell
patent: 4977618 (1990-12-01), Allen
patent: 4977619 (1990-12-01), Crimmins
patent: 4980926 (1990-12-01), Noetzel
patent: 5247580 (1993-09-01), Kimura et al.

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