Interpretation is the oral rendering of oral messages, and may be done either simultaneously or consecutively. Simultaneous interpretation is by far the best known of these techniques. Here, the interpreter sits in a booth receiving the message to be interpreted through earphones; then, having understood the message, he or she delivers it in the target language into a microphone.
A TRANSLATOR is one who renders WRITTEN word from one language to another. An INTERPRETER is one who renders SPOKEN word from one language to another.