A sonic scanner was a type of portable scanner. It could scan for sounds above or below the operator's hearing range, or amplify sounds captured at long-range.[1]
It was a mid-range scanning device for reconnaissance and to intercept and decode communication signals. They could also be used to sweep an area for listening devices.
Mas Amedda was known to use a sonic scanner.
Sources
- Gundark's Fantastic Technology: Personal Gear
- The Essential Guide to Weapons and Technology
Star Wars: Power of the Jedi (Pack: Mas Amedda) (backup link)