Wireless Telegraphy and Telephony
Forfatter: Alfred P. Morgan
År: 1917
Forlag: The Norman W. Henley Publishing Company
Sted: New York
Udgave: Third Edition, Fully Illustrated
Sider: 33
UDK: 621.396.1 Mor
A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
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WIRELESS TELEGRAPHY
III
are the result of various degrees of stretching of the vocal
chords, together with the movements of the mouth, lips and
tongue.
VOCAL CORDS
Fig. 128.— 1 he vocal cords when relaxed.
Speech is the sound produced by the vocal chords of a
human being, modified by the movements of the lips, tongue,
and cavity of the mouth. The consonants are made by
Fig. 129.—Koenig’s manometric flame apparatus.
movements of the tongue and lips obstructing the sounds
at their beginning or end, while the vowels are formed by
a steady voice modified by the resonance of the different
shapes or sizes given the parts of the mouth. The waves