High Quality Content by WIKIPEDIA articles! Sensurround is the trademark name for a process developed in the 1970s by Cerwin-Vega in conjunction with Universal Studios to enhance the audio experience during film screenings. Specifically developed for the 1974 film Earthquake, the process was intended for subsequent use and was adopted for three more films, Midway (1976), Rollercoaster (1977) and in the theatrical version of Saga of a Star World (1978), the Battlestar Galactica pilot. Sensurround worked by adding extended-range bass for sound effects. The low-frequency sounds were more felt than heard, providing a vivid complement to onscreen depictions of earth tremors, bomber formations, and amusement park rides. The overall trend toward "multiplex" cinema structures presented challenges that made Sensurround impractical as a permanent feature of cinema.