Article

Ultrasonic whistle

Legends

Legends. This article is part of Legends: the expanded-universe stories that Lucasfilm set apart from canon in 2014.

An ultrasonic whistle was a device that produced sounds above the normal range of Human hearing.

Text and facts from the “Ultrasonic whistle” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.

Appearances

1 work, in story order