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| Communication Systems with Input and Output Transducers |
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| The input transducer converts the message to an electrical signal say a voltage or current. Another transducer at the destination converts the output signal to the desired message form. |
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| Illustration |
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| The transducers in a voice communication system could be microphone at the input and a loudspeaker at the output. |
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| Communication system with input and output transducers |
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| Note: |
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| The terms "signal" and "message" will be used interchangeably. This is because the signal, like the message, is a physical embodiment of information. |
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