The Telegraph-courier. [volume] (Kenosha, Wis.) 1888-1946, 1925-09-17
DEAF, DUMB GET
HOPE AT EXHIBIT
Latest Steps in Advance in
Radio Science Help
Medical Progress.
ARTIFICIAL DEVICES

San Francisco - The deaf may
hear, the dumb speak. Doctors may
hear the heart beats even in an un-
born babe by means of new inventions
in the radio field displayed at the
San Francisco Exposition and Conven-
tion.
On the final night of the show a
new electric stethoscope put out by
the Western Electric Company was
given a demonstration by broadcast
ing from the glass-fronted studio in
view of thousands attending the expo
sition. The pulsations of the human
heart were broadcasted by way Of
XIX so that thousands of people for
hundreds of miles around could listen
to a comparison between the beating
of a diseased heart and a normal
one.
DR.. Thomas j. Crowley, assisted by
two patients, gave explanatory COM
ments.
And doctor listening in by radio
from his own. office gave confirma-
tory Independent diagnosisI
The new stethoscope is so sensi-
tive that it reveals sounds in the hui
man body hitherto unheard by doc
tors. Yet all sounds save those to
which the diagnostician wishes to lis
ten can be cut out.
Artificial Speech.
Another Device is an artificial
larynx for the dumb, whose vocal
cords have been removed. A rubber
cap covers an orifice in the patients
throat and tube connects to a mouth
piece. To the tube is attached a lits
tie sound box containing an artificial
membrane.
The patient speaks silently into this
and his silent words are converted
into sound by the membrane. By
tightening or loosening the membrane
the patient can have a bass, tenor
alto or soprano voice as desired, and
may even sing in all registers.
Still another invention gives scien-
lists exact methods of measuring the
percentage loss of hearing in the
deaf. The patient listens to sounds
covering every octave within normal
hearing; and when the sounds are lost
the diagnostician records the loss on
chart, from which at the end of the
test an average is drawn. Fl
This electrical audiometer is also
an aid in determining the cause Of
deafness, and will be invaluable to
physicians in giving them exact data
as to the loss or gain of hearing over
protracted period, SO that they may
accommodate their treatment accord
ingly.
+ To Test Pupils.
A similar but less exact device en-
ables school teachers to test the hear
ing of class students, as many as IL
at time. The response Of each in
dividual to the playing of phonos
graph record receding or gaining in
sound as each repetition is recorded ON
chart by each student.
Comparison of these results with a
masterchart held by the teacher gives
accurate information regarding the
aural capacities of each child. &
An improved hearing device for the
deaf on the vacuum tube principle
was also on display at the Pacific
Radio Show, giving the deaf greatly
increased range of possible hearing.
A professor at Stanford University has
been enabled by this device to attend
conferences at which many speakers
were gathered about table, and tc
take part in discussions for the first
time in 20 years.
The new device is portable and COM
pact, but rather heavy on account of
the batteries.