If you are from the pre cell phone era that is from 90s or before then probably you would have experienced communicating over walkie-talkies. Before the cell phones revolutionized our communicating technique, walkie-talkies were Omni present. You could find them on camping trips, picnics, fishing season and numerous other places. If you have used one of the mesmerising hand held radio devices then I am sure that the question about how do they work must have crossed your mind. In this article we have explained how they work and also included some other information on them. Before we go on to explain how they work, let us also tell you that in no way walkie-talkies have become a thing of the past. They are pretty much in use nowadays also. For example they are in the heart of any security system or even traffic management. As a matter of fact they are in the heart of any event in which close co-ordination between men is required because walkie-talkies are an effective and cheap way to communicate over short distances.
A walkie-talkie hand device is a simple communication device which contains a transmitter, a receiver, a battery and an antenna. Walkie-talkie works on the principle of sharing a radio wave frequency. The beauty of walkie-talkie is that whatever you say on one of the device is audible over all the devices that are set on that frequency. Security people widely use walkie-talkies for this very property. Now moving onto the important question of how do they work? The moment you say something on one of the devices, your sound wave is received and converted in electrical pulse. The electrical pulse is then converted into radio wave which is then transmitted by the transmitter over the field. The range of the field is decided by the frequency in use. The range can be increased over 1000 miles by using a suitable frequency. The receiver sets receives the radio waves and convert them back into electrical waves and then back into sound waves. The best part of using a walkie-talkie is that it can only act as receiver or a transmitter and hence there is no sound interference which might create noise. The best two way radios also ensure that there is no frequency overlap that is they give the option of using multiple frequencies by the same set and hence you can create two or more network in the same area.