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Walkie Talkie

I’m  going  to  discuss  further  about  the  walkie  talkie technology. Walkie talkie is a technology that use to communicate, it is a hard­held, portable, two­way radio transceiver. They communicate wirelessly (using radio waves) on a single, shared frequency band. Each battery powered unit contains a transmitter/receiver and antenna (for sending and receiving radio waves), a loudspeaker that often doubles up as a microphone when you talk into it, and a button that you “push to talk”. Unlike a normal radio, which will only pick up broadcast voices or music from a radio station, a walkie talkie is a two way radio, while you can both talk and listen then you will send your voice either you will receive the voices. The main drawback is that the same frequency channel is used for both things, so only one person can talk at a same time.

There are the advantages of walkie talkies. Walkie talkie is the most benefits over mobile phones are that they are license free and do not have any associated call charges. You can clip a walkie talkie to your clothing; they are lightweight and easily carried about your person. The walkie  talkies  can  be  used in any activities such as playing, business purposes, security purpose and educational purpose. The walkie talkie/two way radio can transmit voice signals at the maximum range of two to ten miles. You can connect to one another with no hassle. Compared to cellular phones, this device can be used even if there is no signal coming from the cell sites of the communication companies because it has own or frequency to use, and also for the another one who listen. In terms of clarity and security, walkie talkie radios are much clearer and secure because it toggles between the talker and listener. Also, the communication device is easy to use and you can communicate immediately without hassles.

Therefore walkie talkie has some disadvantages too, such as their low power results in relatively short range compared with higher power radios, easy availability may result in the channels being congested with multiple users, in some areas short­term hire channels may be shared with several other users, and by sharing of a limited number of radio channels can result in the channels being congested with multiple local users.

One of the solution is that, If you have an unlicensed two­way radio, then transmission interference is the drawback of this.  Unlicensed radios share their frequencies with others.  If your site is situated in a built­up busy area then this could be a problem if you do not want others listening into transmissions or you hearing any interferences. If interference is an issue for you on your unlicensed radios then you should seek to purchase a licence from Ofcom. The Office of Communications (OFCOM) is responsible for the enforcement, protection and management of the radio spectrum.

This technology occurs with some serious problem while they are using it. The electromagnetic radiation in the walkie talkie consists of waves of electric and magnetic energy moving together (that is, radiating) through space at the speed of light. Radiofrequencies are a natural consequence of wireless and electronic devices. Radio frequencies are most closely associated with broadcasting media, such as radio, walkie talkie, television, or anything that has antenna, built in or otherwise. Radiofrequencies waves can be characterized by a wavelength and a frequency. The radio frequencies part of the electromagnetic spectrum is generally defined as that part of the spectrum where electromagnetic waves have frequencies in the range of about 3 kilohertz (3 kHz) to 300 gigahertz (300 GHz). Biological effects that result from heating of tissue by the radiofrequency energy are often referred to as “thermal” effects. At relatively low levels of exposure to radiofrequency radiation, that is, levels lower than those that would produce significant heating, the evidence for harmful biological effects is ambiguous and unproven.

In general, however, studies have shown that environmental levels of radiofrequency energy routinely encountered by the general public are typically far below levels necessary to produce significant heating and increased body temperature. There may be situations, particularly workplace environments near high­powered radio frequency sources could affect the

environments.  Where  recommended  limits  for  safe  exposure  of  human  beings  to  radio frequency energy could be exceeded. In such cases, restrictive measures or actions may be necessary to ensure the safe use of radio frequency energy. There are other sources of information regarding RF energy and health effects. Some States maintain nonionizing radiation programs or, at least, some expertise in this field, usually in a department of public health or environmental control.

The college students has proven that cell phone radio frequencies may instigate brain tumors and even cancer, exposures to radio frequencies have been unofficially linked to sleep disorders, headaches, and other neurological problems. Also, it claims that cell phones promote “radio wave sickness” have propagated through society for years. Associated illnesses include multiple sclerosis, depression, autism, and a slew of other common ailments. These are just a few of the examples of health hazards unofficially charged to radio frequency emissions.