There's even a little reference to the sound engineer who created Vader's mechanical breath, Ben Burtt. In a section of the trademark filing entitled "miscellaneous statement," Lucasfilm's attorneys describe the sound as "rhythmic mechanical human breathing created by breathing through a scuba tank regulator." Here's a great little interview with Burtt describing the process of designing the sound—and how the first experimental mixes made Vader sound like a "moving operating room."

Advertisement
Advertisement

You can listen to the final sound filed with the trademark—all 3:54 seconds of it—here. [USPTO]

Image: Chris Harvey / Shutterstock.com