Cell Phone

Cell phones are an extremely common tool in today's technologically advanced world. Cheap, portable, and effective, these small phones are considered by some to be a necessity. However, a cellular phone is not actually a real phone in the true sense. A cell phone is in fact a radio transmitter and receiver. When a person speaks into a cell phone, the machine translates their speech into radio waves. These waves are relayed through cell phone towers and delivered to another phone. Similarly, when a cell phone receives a call, it transfers the radio frequency back into speech. This is the reason that being underground, or in concrete building, can make cell phone reception difficult.