Acoustic signaller

Acoustic signallers were components which could be installed into droids. The droid HURID-327 was equipped with a binary acoustic signaller.

Behind the scenes

Acoustic signallers were first mentioned in Galaxy Guide 7: Mos Eisley, a Star Wars Legends supplement for Star Wars: The Roleplaying Game, written by Martin Wixted and released in 1993. They were confirmed to be canon by the reference book Star Wars: The Force Awakens: The Visual Dictionary, which was written by Pablo Hidalgo and released in 2015.

Sources

Star Wars: The Force Awakens: The Visual Dictionary
Star Wars: Build Your Own R2-D2 1
Star Wars: The Complete Visual Dictionary, New Edition

Appearances

"Rendezvous Point" — From a Certain Point of View: The Empire Strikes Back (Mentioned only) (Unknown)

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"Rendezvous Point" — From a Certain Point of View: The Empire Strikes Back audiobook (Mentioned only) (Unknown)

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