Word: soundproofed
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Dates: during 1925-1925
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...last week a scientist came forward with the statement that noise can be kept out of a room just as well as a snowstorm can; that a scream can be locked up. He, Dr. Paul Heyl, Chief of the U. S. sound laboratory (Bureau of Standards), has invented a soundproof partition, which he demonstrated in Washington. On a night when two dances were being given in the Mayflower Hotel-a charity ball in one ballroom and a party for members of the Diplomatic Corps in another-he put up his partition between the two dance floors...
Inventor Hammond has perfected for the piano a device which enables the player to have control over notes after he has struck them. It is operated by a fourth pedal, the "Hammond Pedal", which opens and closes an arrangement of parallel revolving slats on the roof of the soundproof case much as the old-fashioned window-shutter was manipulated by its spindle. Since the case is soundproof, the tone can be built up within the pianoforte, its volume depending on the angle of the shutter) and allowed to escape at the will of the player. Again, the reflector can return...