Word: deaf
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Dates: during 1930-1939
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...further valuable aid to the deaf, an apparatus which will help teach them to speak with normal intonation, has been designed at the Cruft Laboratory by Frederick V. Hunt, instructor in Physics and Communication Engineering...
...deaf person wants to regulate the fundamental tone of his speaking voice. He can only do this by regulating the "pitch." The new machine, by employing a distorting amplifier and a sound filter, can segregate and record the fundamental pitch even when it is so obscure in the original speech as to be hardly detectable by the usual instruments...
...using the machine, the deaf person talks into a microphone and the sounds of his voice are changed into electrical energy. This energy is then converted into impulses which can be measured in terms of "pitch...
...deaf person can watch the fluctuations of his voice indicated by the pointer of the instrument which registers the impulses immediately. Frequencies from zero to 16,000 cycles per second can be recorded, while the range of the human ear is from 20 cycles up to a high squeak of about 16,000 cycles per second...
...turns again & again to the enigmatic figure of Lenin, writes of him with an historian's objectivity rather than with a newshawk's interest in a spectacular figure. He insists on Lenin's cold colorlessness, even while relating how Lenin plotted to disguise himself as a deaf-&-dumb Swede in order to return to Russia; how he escaped arrest by hiding successively in a loft, a hut in a hayfield, a railway locomotive; how still in hiding, he began a theoretical work on the State just as the revolution approached its climax...