Board Thread:Warhammer 40k General Discussion/@comment-6134883-20130412155317/@comment-7186329-20130413132147

Yes they do. If WraithLords can talk, and communicate telepathically with other eldar, as you said, then there is no reason Wraithseers would not be able to talk. I imagine their voice to be similar to this.

http://www.youtube.com/watch?v=xgtOGPBWoDU