A walkie talkie, more officially known as a two-way hand-held radio transmitter, is an innovative hand-held transceiver developed during the Second World War. Its development during the Second World War was differentially attributed to German radio engineers, mainly Alfred J. Gross, Harry W. Mattick, George C. Mattick and George C. Tippett. The United States Army Signal Corps (USAC) used the walkie talkie in aiding operations in Europe against the German military.
It utilizes radio waves to send and receive signals. In order to function, a transmitter first receives radio waves, which are converted into optical ones, then these become audio waves. Then the transmitted waves undergo compression, which makes them strong enough to penetrate a given material such as a plastic cone. In this process, the signal is converted into wave forms that can travel through solid objects and liquids such as antifreeze. Based on how these signals are transmitted, some walkie talkie models are referred to as either ‘soft’ or ‘strong’ walkie talkies.
A walkie talkie has a number of features, among them being its two-way radio transmissions. These signals allow only one person to use it. In fact, if two people wish to use the device at the same time, they need to agree on a channel where transmission could take place. There is also an option wherein by only one person can use the device. In this case, the waves cannot transmit beyond the limited capacity of the unit.
Walkie talkie uses different modes, including simple single mode and enhanced multiple frequency band transmission. For single mode, it transmits only a standard radio frequency. The signal can be detected by a normal scanner, but it will not generate any signal even if the transmission becomes stronger. Meanwhile, for the enhanced multiple frequency band transmission (EMR), it allows two or more devices to receive and send electronic pulses via the same antenna. This mode has a wider range than that of the single frequency band.
Manufacturers have introduced a number of advanced models in the market. Some of these include; handheld groundstation, which allows two or more units to communicate over short distances and at the same time receives and sends electronic pulses in the form of radio waves. Moreover, there is the MSA or multi-satellite system, a ground station that can work independently as long as there is an active feed line. On the other hand, there is also dedicated satellite feed system. It can detect satellites that are within range and synchronizes them with the information of a single unit using a dedicated frequency band. There are also handheld walkie talkie devices that has a digital display and controls similar to a QWERTY keyboard and a printer.
Many people use walkie talkie systems during camping trips and exploration expeditions. The main reason behind their popularity is that they allow two-way communication between two or more people. In addition, a single walkie talkie can work well in monitoring forces on the move. They are also ideal for use during search and rescue operations and in military operations. In all, a walkie talkie is the ideal and cost-effective means of communication for the whole family.