There are several techniques that interpreters use depending on the type of interpreting required. Some key techniques include simultaneous interpretation where the interpreter renders the translation simultaneously as the speaker talks. Consecutive interpretation involves the interpreter listening and then translating statements in segments when the speaker pauses. Whispered interpretation involves simultaneously translating for a small audience. Sight translation requires orally translating the content of a written document. Other techniques are over-the-phone, video, liaison and medical interpretation.