Evening star. [volume] (Washington, D.C.) 1854-1972, 1928-02-27
SECRET BROADCAST
SYSTEM A SUCCESS.
,TransIating of Sounds by
Electric Brain" Is
Demonstrated.

The essence Of radio hroadcasting III
the United States is widespread and
diverse dissemination. with an appeal
to the greatest possible number OF
listeners. This fact however. did not
deter scientists of the Bell Telephone
Laboratories from pursuing researches
into the secret transmission of speech
or music by radio. That they have
succeeded has been demonstrated before
q select group in Washington.
The demonstration was given by the
chief commercial engineer of the Bell
laboratories. SerGiuS p. Grace. He used
a phonograph. from which Cmanated
tumble Of sound. representing variated
frcQucncies into which the original
sound had been broken up. Spoken into
An electric translator, referred to as
an electric brain" the pieces Of
sound" were rcordcred rs map puzzle
is arranged and the whole sound
emerged intact and perfectly nodulatcd.
Value Is Limited.
This. In short, is the principle upon
which the Bell radio engineers have
based their method for keeping broad
cast speech from being broadcast
literally Only a receiving system equip
ped with the electric brain" Will be
able 10 pick up the programs thus
transmitted.
The practical value of this system,
In view Of the fact that advertising and
the largest possible audience form the
present economic basis OF broadcast
Ing in this country, is naturally limited.
First Of all. Mr.. Sergius announced, 1t
will be adapted TO the transatlantic
neutrality-suspicious.. This will probably be
Its most important application. for 1t
Will obyiaie the objections OF COM
mercial and diplomatic interests that
the radiotelephone conversations may
be heard by any one having the proper
pickup apparatus.
The military value of the system IS
tneStiInable Communication by voice
with field forces or ships at sea may be
carried on without danger Of over
hearing. as long as the key TO the
distorting means is kept secret. Adap
tation Of the electric brain" to code
radio would eliminate one Of the prob
lens met during the world war. when
the raGiationS in the ether waves could
be picked up by the enemy. OF course,
secret codes kept the messages obscure.
but sometimes the secret code books
were obtained or deciphering experts
decided the messages.
Hammond Gets Patent
officials of the American Telephone
and Telegraph Co. announced while
attending the recent Short-Wave hear
tngs here that they intended soon &c
put into operation their secret radio
telephony process. Shortly before that
time, John Hays Hammond, j-,. Glou-
cester. Mass. radio inventor. obtained
q patent from the United States Patent
Once on a means Of secret radiant
Transmission.
phracie Wells ard Grace Hayes. grand
opera and light opera stars, respective
IL. will present lively program Of the
best known and most melodious song
hits Of the le27-I928 season in the
General Motors family party. which
WRC will broadcast tonight at $50
O'Clock Miss Hayes was heard in q
similar program month ago.
The weekly concert of the A. & p.
Cvpsies. 20 be broadcast a. o'clock,
viii be dedicated TO Ohio. The featured
selection will be "Cayalleria Rusticana,
O favorite Of Gov. Donafey- Lewis
James, tenor. will be the assisting vocal
artist.
Josef stopek, violinist. will BE- the
individual star OF the Roxy broadcast,
70 begin at 7:30 o'clock. WRC's other
attractions include the Fisk Time to
Retire Boys and the LIE Paradis Band
wMAL is featuring tonight a half
hour concert by the Washington Male
Quartet, composed OF Paul Edward Gar
Der. James L. Ewin, william Salem
Eayrlie and Washington Irving Cleve-
land. WIFI has scheduled varied
musical program, while WRHF's con-
tribution 10 the radio entertainment
Will be a dinner concert and a spon-
sored musical