Moreover, the source of a sound is often unknown. No one has a greater need to locate sounds than sound designers , creative professionals who incorporate sound effects with dialog and music to produce sound tracks for feature films and television programs. Sounds are the primary concern of sound designers, and they care little about the source of sounds. In fact, sound designers have made a science out of fooling the listener's ear. He tells of how a single recording of an African waterfall, when played at different speeds, has been used convincingly to create the sounds of printing presses and atomic bomb explosions.
Fictional characters provide a wonderful opportunity for creativity.
In the Star Wars movies, the voice of Chewbacca came from a walrus. In the movie, Jurassic Park , a power saw was used for the sound of the T-Rex. Reportedly, the sound of the tornado in the movie, Twister , includes a lion's roar. For the 1998 version of Godzilla , sound designers spent a year developing the sound of the monster's roar, which combined musical instrument and animal sounds with the original roar from the 1950s Japanese films. One goal of sound design is to meet the expectations of listeners.