Plasma_wave_receiver
A plasma wave instrument (PWI), also known as a plasma wave receiver, is a device capable of detecting vibrations in outer space plasma and transforming them into audible sound waves or air vibrations that can be heard by the human ear. This instrument was pioneered by then-University of Iowa physics professor, Donald Gurnett.[1][2] Plasma wave instruments are commonly employed on space probes such as GEOTAIL,[3] Polar,[4] Voyager I and II (see Plasma Wave Subsystem), and Cassini–Huygens.[5]