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A ribbon microphone, also known as a ribbon velocity microphone, is a type of microphone that uses a thin aluminum, duraluminum or nanofilm of electrically conductive ribbon placed between the poles of a magnet to produce a voltage by electromagnetic induction. Ribbon microphones are typically bidirectional, meaning that they pick up sounds ...
One such situation would be during a wide shot that forces the boom operator to keep a distance from the speaker that is not close enough to achieve a good signal-to-noise ratio with the microphone. In that instance, a lavalier microphone hidden on the speaker would achieve better signal-to-noise ratio for recording speech because of its proximity.