How were Star Wars' iconic sounds created from everyday objects?

The answer

Sound designer Ben Burtt revolutionized cinema audio by creating Star Wars' entire soundscape from real-world sources rather than electronic synthesizers. The iconic lightsaber hum was born from combining the idle motor of an old film projector with the interference buzz from a broken television set. Burtt then recorded himself swinging a microphone near these sources to capture the Doppler shift effect of a moving blade. For blaster sounds, Burtt spent weeks across Los Angeles hitting guy-wires on radio towers with a metal wrench until he found one with the perfect resonant ping. Chewbacca's voice blended recordings of bears, walruses, lions, and badgers. Burtt's approach was so groundbreaking that he is credited with popularizing the job title 'sound designer' in the film industry.