Sound-powered telephone
Sound-powered telephone
en.wikipedia.org
Sound-powered telephone - Wikipedia
You're viewing a single thread.
5 comments
-
So the ol' shoelace and tin can phones actually work?? đŽ
-
No, this is literally connecting 2 microphones/speakers (they are the same).
-
Which, come to think of it, is essentially the tin can method, just with conversion to an electrical signal that preserves fidelity over longer distances than kinetic vibrations on a string.
-
Well, if we ignore everything... you get sound from A to B. Essentially like a smartphone :D
-
Lol look Iâm all for pointless belligerence and poindextering online, and do it myself often, but (a) Iâm gonna go out on a limb and say commenter above probably doesnât think theyâre actually the same, and regardless (b) things donât have to be precisely the same to make abstract comparisons that aid understanding or help learn something new.
For example, your smartphone comparison. Some have a programmable RF transponder that passively converts a nearby RF pulse into a digital reply. They can read other transponders as well. If you and a friend agreed on a cipher, you could pretend to be secret agents by taking turns programming a brief âtext,â switching off the device and leaving it on your desk for the other to scan as they pass by. Itâs bidirectional and point to point with passive transmission, but itâs wireless and powered by electromagnetic waves rather than acoustic :D see? Itâs fun.
Edit: spelling
-
-
-
-