We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
Talking Pictures
gadgets, exactly like an old-fashioned well sweep. At the end of the pole there is a round object about the size of a cannon ball used in i860. The "well sweep" is a "microphone boom." The cannon ball is the microphone. The sweep permits the microphone to follow a player as he stands up or sits down, walks to the right, left, straight ahead, backs up, or climbs a stairway.
The microphone is centered with a disk slightly larger than a silver dollar. This is the entrance to the interior of the microphone. Just inside is a diaphragm, not unlike that in the mouthpiece of a telephone. The voice sets up a vibration in this diaphragm, exactly as with the telephone, which in turn sets up a varying oscillation of electrical current impulses. If the scene is made on location, these impulses are carried over a wire to a portable recording machine. Usually, they are carried to a permanent apparatus in a building which may be adjacent to the stage, or some distance from it.
Formerly, the microphone was long and slim, like a vacuum bottle, with a separate protuberance at the bottom for the diaphragm. Later it was made round because the slim form and separate diaphragm caused malformations of the sound waves as they went over its uneven surface. These malformed waves were part of annoying "ground noises" in early sound reproduction.
The stage is padded to prevent malformations of sound in larger and more vicious forms. Its special acoustics bring the voice to the microphone, but very little farther. Sound recording must not be complicated by sounds reflecting at different angles from furniture or five or six different wall surfaces.
[166]