The Empress has a Voice because she sits on a Binding Chair • /r/WoT
Sammael off-handily mentions the Binding Chair when talking to Sevanna, but he does not know where one is. Of course he has not been to Seanchan where the Empress (may she live forever) sits on one. I think The Crystal Throne is a ter'angreal that allows a non-channeler to weave compulsion on anyone, and this fundamentally effects how society has formed around the Empress...

An interesting theory. Regardless of whether the Crystal Throne is a binding chair, or if its effect qualifies as Compulsion, I like the idea that the Empress has a Voice because speaking with her own voice from the throne has extra effects.

Two of the men were trying to move what appeared to be an oddly twisted redstone doorframe; the corners did not meet properly, and the eye did not want to follow the straight pieces. It stayed upright, turning freely but refusing to tip over however they manhandled it. Then one slipped and fell, through the doorway up to his waist. Rand tensed. For a moment, the fellow seemed not to exist above the waist; his legs kicked wildly in panic. Until Lan, a tall man in drab shades of green, strode over and hauled him out again by his belt.

This makes me laugh more than I reasonably should.

Robert Jordan, The Wheel of Time: The Fires of Heaven, Page 60

Mat with the Eelfinn
  • Mat: If I had my way, I would want those holes filled.
  • Eelfinn: Done!
  • Mat: You're as bad as Aes Sedai. Well, I want a way to be free of Aes Sedai and the Power, and I want to be away from you and back to Rhuidean, if you will not answer me!
  • Eelfinn: Done!
  • Eelfinn: Done!
  • Eelfinn: What was asked will be given.
  • Eelfinn: The price will be paid.