Troll hunters may be able to communicate entirely in such ranges. Trolls speaking to humans may be able to speak entirely in ranges a human can hear, but they'd have to learn what those were - perhaps there's a pidgin form.
IMG there are sorcery spells Infrahearing and Ultrahearing, and a special kind of tuning fork (quite hard to make, so rare) which warns you when a Troll is using Darkscan in your direction.
Andrew
Powered by hypermail