how do you listen a telegraph?

Answer 1

You can use either headphones, most common, or put it on 'speaker' and work from there. Onceupon a time headphones were a must but with modern technology all things are possible. Actually there are devices much like a typewriter that translate those dots & dashes into text.



Peace....

Answer 2

The electrical telegraph is a telegraph that uses electric signals. The electromagnetic telegraph is a device for transmission of written messages without physical transport of letters over wire. The first telegraphs were built independently in the apartment of Russian inventor Pavel Shilling in St.Petersburg, in 1832 where it was demonstrated to wide public. Another electromagnetic telegraph was used publicly by Carl Friedrich Gauß and Wilhelm Weber in Göttingen's university in 1833.

In 1795 Francisco de Salva offered an electrostatical telegraph. Telegraphy based on static electricity was impractical because of the high voltages required. Alessandro Volta invented the Voltaic Pile in 1800, allowing a continuous current for experimentation. Samuel T. Soemmering constructed his electrochemical telegraph in 1809. Hans Christian Ørsted discovered in 1820 that an electric current produces a magnetic field which will deflect a compass needle. Also in 1820, Johann Schweigger invented the galvanometer, with a coil of wire around a compass, which could be used as a sensitive indicator for electric current. In 1821, André-Marie Ampère suggested that telegraphy could be done by a system of galvanometers, with one wire per galvanometer to indicate each letter, and said he had experimented successfully with such a system. In 1824, Peter Barlow said that such a system only worked to a distance of about 200 feet, and so was impractical. William Sturgeon in 1825 invented the electromagnet, with a single winding of uninsulated wire on a piece of varnished iron, which increased the magnetic force produced by electric current. In 1828, Joseph Henry improved the electromagnet by placing on it several windings of insulated wire, creating a much more powerful electromagnet which could operate a telegraph through the high resistance of long telegraph wires. An electromagnetic telegraph was created by Baron Schilling in 1832. Carl Friedrich Gauß and Wilhelm Weber built an electromagnetic telegraph in 1833 in Göttingen. In 1835 Joseph Henry invented the relay, by which a weak current over long wires could operate a powerful local electromagnet. [1] [2]

You could get more information from the link below...

Answer 3

The dots and dashes form a code that makes letters.
Morse Code, named after the inventor.

Answer 4

It's set in morse code. You write out the sounds [ ... --. .-.] and then translate it from there. It'll be in sets of three, such as ... --- ..., that meaning "SOS".

Answer 5

you don't?