The vocal enhancer was designed to enhance or alter the sound or volume of the wearer's voice. Some species used these to make the wearer's voice more understandable. Some vocal enhancers were used for disguising the voice of the wearer. Due to the damage sustained to his respiratory system at Mustafar, Darth Vader used a vocal enhancer to create his deep, ominous voice. In addition, Darth Sidious used this to disguise his voice in 32 BBY.
- Darth Plagueis
- Star Wars: Episode III Revenge of the Sith
- Dark Lord: The Rise of Darth Vader
- Star Wars: Episode IV A New Hope (First appearance)
- Star Wars: Episode V The Empire Strikes Back
- Star Wars: Episode VI Return of the Jedi