A Laud Hailer is a type of sound amplification device widely used throughout the Imperium of Man. Whether belting orders over the ferocious roar of combat or addressing a crowd of thousands of men, Imperial military commanders and other Imperial speakers often require great volume, and a Laud Hailer is the perfect tool. A Laud Hailer can amplify normal speech levels such that an entire crowd can hear it clearly across even the largest of spaces.
Sisters of Battle Use
The Orders Militant of the Adepta Sororitas often attach large Laud Hailers to their vehicles. It emits a heavenly voice proclaiming the righteousness of the Emperor and strikes fear into the hearts of the enemy.
- Only War: Core Rulebook (RPG), pg. 201
- Warhammer 40,000: Wargear (2nd Edition)