Evening journal., 1922-09-13
"PHONOF|LM' IS
latest MOVIES
New Invention Will Record
Human Voice Perfectly
on Picture Film
DE FOREST, SCIENTIST
is ITS
BY CARL d. GRoAT.

BY CARL ID.
SUnited Press STAFF Correspondent
BERLIN Omitted Press).-Th'
human voice a be recorded per
fectly on a movie film.
1t can then be reproduced, along
with a picture, in perfect synchro'
nization. In other words, the per-
feet talking movie" has beer
achieved.
Henceforth, It will be possible for
a presidential candidate to make
his speeches at home. have his pic
ture and voice filmed simultaneous
" and appear per movies on a
~vicaroius campaign trip.
or with a thousand feet OF film
minus pictures-the whole music
of a two hour opera a be repro
dueed.
These things-and many other
combinations, including use OF film
in radio telephony-have been made
possible through an invention of the
famous American scientist and wire
less pioneer. Lee deForest.
deForest has completed his work
here and is now under way TO Amer
ica, where he is to adapt his inven-
ton to the practical work Of actual
studio production.
His invention involves simple APP
plications Of light and electricity
technique. Through W. small at
tachments-one for the film camera,
the other for the projecting ma
chine-the remarkable synchroni-
cation of picture and sound is
achieved. The sound is amplihed
through application of the we'll
known principle Of the audion am
pliier-the attachment used In
connection with transcontinental
transmission Of speeches.
In lay language. deForest's lnven-
tion-he calls it the "phonohlm"-
is this:
In the ordinary movie camera a
small gas-flied tube Is inserted.
This is linked up with an electric
light. The actor appears before the
camera. singing. playing "a violin
or talking. The sound waves. eman-
aIlDk lIOW MAAA IL ~ 0ANANfA
against the little gas filled tube.
The intensity of the waves affects
the intensity of the electric light
through the tube, and reacts
to make a thin bead along the edge
Of the film.
This bead or thread is the voice
Meantime. the camera has
recording faithfully every mo-
ton Of the actor, and there are syn
chronized with his voice or his
The film is then put into the re-
producing lantern. To this machine.
tube is attached. The bead
light to pass through-nat-
urally in varying degrees according
to whether the voice sound imprint
I'd thereon has left a light or dark
impression. The light wave thrown
the tube produces varying
OF electrical resistance. {
his resistance is passed along TO
device like a photograph horn, I
fter having been amplihed through C
he audion. s
The advantage of the phonohlm '
es in the fact that there is always c
omplete synchronization and that
films can be used. Only n
he small attachments must be add /
d.. and that will involve no pur- n
base Of special cameras or projec- S
ors- II the Aim breaks and a strip X
be cut out, the voice record is
It'll in harmony with the picture. n
IN earlier talking movies, this was {
not the case. b
deForest gave a private exhibition d
% a few press representatives. The
apparatus worked perfectly. One I
,ould follow the lip action and the
and realize hat they we're l
perfectly attuned. q
deForest began his experiments ]
three years ago, but got deep
y into them only a year ago. when
70 took over a laboratory in Berlin. {
fe predicts for his experiment a I
evolutionary effect oil the stage
nd the movie business. 6
It will be possible to run a phono- '
I'm strip through a picture machine
nd send opera music broadcast per
Dramas on the screen will )
ave all the realism Of the 'legiti- $
ate" says deForest. And, he be- s
eves-seriously, he says-that In I
Mother year much political cam .
will be done by canned
liking Aims instead of through {
ainful stump speech making tours. :
? N nuyEn I'M mo d