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Ciro Santilli
@cirosantilli
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How the telephone works
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Telephone
Updated
2025-04-24
+
Created
1970-01-01
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We
are at
a
point in
history
where the
electrical telegraph
is well established.
But people don'
t
want to press letters one by one on
a
switch
. They want to talk!
The
first
phones appear to have used
telegraph
lines directly.
Also wired phones don'
t
require
modulation
, which likely made their development much easier than
wireless
voice transmission. You just send the
signal
as
a
voltage
differential directly obtained from the air
pressure
:
how the telephone works
.
Total
articles
:
1