TELETONE FUNNY TELEPHONE
The Teletone funny telephone is a telephone that shows us how sound waves are transmitted through a wire. When we speak, our voice travels along the string, vibrating a membrane that is in the receiving device, which becomes a transmitter when we answer the message.
Our entertainment has a string of no less than four meters, so when you put it tight and speak even very quietly, the voice of the transmitter can be heard perfectly on the other end.
This entertainment became very popular in the middle of the last century, ours being a reproduction of one purchased in an antique shop, which was called precisely Teletone.
Measurements:
Height: 10.5 cm.
Diameter: 7.5 cm.
VAT INCLUDED
https://antiquus.es/c/instrumentos-opticos/
