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Plaza Sound
Equipment Is Best To Be Obtained News article released in the Liberal, Kansas Paper on May 21, 1930 Travel where you may the new material installed in the west second street theatre is unexcelled ! The Western Electric Sound equipment installed in the Plaza is the finest for reproducing sound pictures which can be obtained. Talking pictures are made of two types - sound on disc and sound on film. The new reproducing machines at the Plaza will handle either type of talkie picture. Most of the films now shown in Liberal are of the sound on film type, because producers believe they can get better results with this type of film. The sound on the film talkie, as its name indicates, is all made on the same film. A strip of film along the edge of the regular film runs through the projection machine with the picture film. This narrow strip of film is so made that is it will admit only certain types of light rays. The light rays that penetrate the film are translated into sound waves and are heard by the movie audience as spoken words. The sound on disc reproduction is really a powerful phonographie mechanism, synchronized with the movie projection machine. Large disc records are used. A point on the record is marked "start" to correspond with a similar "start" sign on the film. When the movie film and the sound record are started together the audience sees the show and hears the spoken words at the same time. Theatre goers are not mistaken when they believe the voices in the talkies come from the screen. The sound is produced at the rear of the theaters in the projection room, but the sound waves are carried electrically to the back of the stage. Here two huge amplifiers gather and reproduce the electric waves in the sound waves and the spoken words come through the movie screen to the audience. Voices in the talkies are directed at the audience. The amplifiers are enclosed in a sound proof material that keeps the sound waves form going in any direction except toward the audience. The amplifiers at the new Plaza are mounted on towers. When the managers desires to use the stage he simply pulls an electric plug out of a socket and amplifiers are rolled back into the wings. |
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Movie House History - Classic
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