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The choice of the right channel affects successful communication. For example, a classroom teacher has to decide which contents to present orally, by talking about them, and which ones to present visually through books. The choice also depends on the receiver whose decoding skills may be better for some channels than for others. [51] [60]
A model of communication is a simplified presentation that aims to give a basic explanation of the process by highlighting its most fundamental characteristics and components. [16] [8] [17] For example, James Watson and Anne Hill see Lasswell's model as a mere questioning device and not as a full model of communication. [10]
Many models of communication include the idea that a sender encodes a message and uses a channel to transmit it to a receiver. Noise may distort the message along the way. The receiver then decodes the message and gives some form of feedback. [1] Models of communication simplify or represent the process of communication.
The five essential parts of the Shannon–Weaver model: A source uses a transmitter to translate a message into a signal, which is sent through a channel and translated back by a receiver until it reaches its destination. [1] The Shannon–Weaver model is one of the first models of communication.
The theorem establishes Shannon's channel capacity for such a communication link, a bound on the maximum amount of error-free information per time unit that can be transmitted with a specified bandwidth in the presence of the noise interference, assuming that the signal power is bounded, and that the Gaussian noise process is characterized by a ...
As Daft and Lengel suggest, face-to-face communication is the best medium for equivocal, or complex, communication between two people, whereas less-rich mediums can be effective so long as the complexity of the information being transferred from one party to the other does not exceed the channel's capacity. [3]
The predominant channel is that of the speaker who directs primary speech flow. The secondary channel of communication (or backchannel) is that of the listener which functions to provide continuers or assessments, [4] defining a listener's comprehension and/or interest. In other words the term "backchannel" is used to differentiate between the ...
The feedback capacity is known as a closed-form expression only for several examples such as the trapdoor channel, [14] Ising channel, [15] [16]. For some other channels, it is characterized through constant-size optimization problems such as the binary erasure channel with a no-consecutive-ones input constraint, [ 17 ] NOST channel.