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
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
CHAPTER VII.
THE EAR. HOW WE HEAR. SOUND AND SOUND WAVES. THE
VOCAL CHORDS. THE STRUCTURE OF SPEECH.
On either side of the head, lodged in a cavity which they
do not completely fill, and situated in the midst of a dense
and solid mass of bone, entering into the base of the skull
and forming the temporal bone, are two membraneous bags
called the membraneous labyrinth and the scala media of the
cochlea. Each bag is filled with a liquid, and is also sur-
rounded and supported by a fluid which fills the cavity in
which they are lodged. Certain small, hard bodies, free
to move around, lie in the fluid of the bag. The ends of
Fig. 120.—Diagi'am of the ear.
the auditory nerve of hearing are distributed around the
wall of the sac, so that they are subjected to the blows of
the little particles of calcareous sand, or otoconia, as they
are called, whenever the fluid in the bags is disturbed.
105