Optics: motion pictures – Removable film strip magazine type
Patent
1981-01-23
1983-08-16
Rubinson, G. Z.
Optics: motion pictures
Removable film strip magazine type
179121D, 352 25, G03B 3100
Patent
active
043993273
ABSTRACT:
Three microphone units of first order sound pressure gradient unidirectional type are disposed in a casing having front and rear portions at both sides in such a manner that the center axes of the microphone units are aligned on the same axis. Two among the three microphone units are arranged to face the front portion of the casing, and remaining one microphone unit is arranged to face the rear portion of the casing. The output signals of the three microphone units are combined at a variable ratio so that the directivity of the microphone system can widely vary from nondirectivity via first order sound pressure gradient unidirectivity to second order sound pressure gradient unidirectivity. The output signals of two microphone units used for obtaining second order sound pressure gradient unidirectivity may be respectively applied to high pass filters before being combined, and the combined signal is fed to an equalizer. If an equalizer having modified frequency characteristic is employed, such high pass filters may be omitted.
REFERENCES:
patent: 3403223 (1968-09-01), Kleis
patent: 3483324 (1969-12-01), Gorike
patent: 3793489 (1974-02-01), Sank
patent: 4308425 (1981-12-01), Momose
patent: 4334740 (1982-06-01), Wray
"Zoom Mikrofon", Funkschau, vol. 52, No. 19, (Sep. 1980), pp. 79-80.
Ishigaki Yukinobu
Miyaji Naotaka
Totsuka Kaoru
Yamamoto Makoto
Rubinson G. Z.
Schroeder L. C.
Victor Company of Japan , Limited
LandOfFree
Variable directional microphone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable directional microphone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable directional microphone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-816004