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Although speech is the most advanced form of communication, there are many ways of communicating without using speech. Signals, signs, symbols and gestures may be found in every known culture. The basic function of a signal is to interrupt upon the environment in such a way that it attracts attention, as, for example, the dots and dashes of telegraph circuit. Coded to refer to speech, the potential for communication is very great. Less adaptable to the codification of words, signs also contain meaning in and of themselves. A Stop sign or as barber pole conveys meaning quickly and conventionally. Symbols are more difficult to describe than either signals or signs because of their intricate relationship with the receiver's cultural perceptions. In some cultures, applauding in 8 theater provides performers with an auditory symbols of approval. Gestures such as waving and handshaking also communicate certain cultural messages. Although signals, signs. symbols and gestures are very useful, they do have a major disadvantage. They usually do not allow ideas to be shared without the sender being directly adjacent to the receiver. As a result. means of communication intended to be used for long distanced and extended periods are based upon speech. Radio, television, and the telephone are only a few -
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