Daily globe. [volume] (St. Paul, Minn.) 1878-1884, 1878-07-01
EDISON OUT-DOING HIMSELF.
A Trumpet With Which the Human Toic
Nag be Heard Ttco Niles 4,cnu

4 Trumpet Hith Which the Human Totce
Nag be Heard Too Niles .I,cau.
New York Sun. 7th lust
"Ihe telescopopohone' is the name of
Mr.. Edison's latest invention. 1t is simply
marvellous ear trumpet, upon the construc-
ton of which Mr.. Edison has been working
for several months. Mr.. Edison's attention
was attracted to the subject by his own deaf
ness. He is able to hear only when TIE
speaker enunciates in loud tone. Mr.. Edi
son is 10th to describe the telescopopohone
except generally, as it is not completed, and
is to be patented. The implement is about
i've and half feet long, and has an internal
arrangement by which sound is concentrated
and made louder. sound which to the
unaided ear is inaudible. becomes distinct
by the use of the telescopopohone. Con
corning it Mr.. Edison said:
"Ihe telescopopohone is assuredly sue
cessful. | have demonstrated that by it's use
not only can those partly deaf hear,
but persons can talk while mile or two
apart
"But do not other sounds comminple-
sounds intervening between the speaker and
the hearerI''
Certainly they do to limited extent, and
more so If the instruments are not pointed
straight
"doW do you rem edy that?''
why, you must point 'em straight. The
same objection could be made to a telescope
II you do not point it straight you see other
effects than the one intended. But, when
the telescopopohone is pointed dlrect1v at
the distant speaker with telescope exactness.
the voice of the speaker is the chief thing
heard
"Does it increase the volume of sound?''
~ have whispered in one of these things
IN very low tone, and the sound in nv ear
was SO loud as to be absolutely painful
MIR. Edison expressed the fullest conf
dence that he would perfect the telescopopo-
hone SO that by its aid partly deaf persons
may hear every whisper on the stage of the
largest theatre.
A gentleman who heard experiments with
the telescopopoh0ne, said that Mr.. Edison
heard distinctly the ticking of telegraph
instrument thousand feet away, and even
the noise OF the chewing and biting of grass
by COW, nearly two thousand feet distant.
one OF the party then stood 600 feet
away, and his whisper was distinctly heard.
although Mr.. Bachelor, standing only fifteen
AoeC iiolu ulIlf, without the aid of the teles-
copopohone, could not hear word.
Then the party tried more striking ex-
pertinent Two of them went at least mile
OH, and talked to each other in an ordinary
tone OF voice. Even at that distance ordl
nary conversation was distinctly heard with
out speaking tube, without any wire or
electrical apparatus, but simply by the aid of
the new ear trumpet or telescopopohone
But, even this was surpassed by the next
experiment, which was at distance esti-
mated at two miles. From that point the
ordinary tone of voice could not be heard
and shouting was necessary, yet the new ear
trumpet did its work, and the hearing was
repeated as before.
'Now, Mr.. Edison, what next?"
ooh" said Mr.. Edison with one of those
hearty bursts of laughter that he SO often in
dulges in, I've not got to the end YET