"I see," he said, and she felt her nerve steady under his composed voice.
The door slammed behind him and he muttered "Lodywrestler" under his voice.
He turned up the volume; there was static and buzzing under the woman's voice.
He muttered something sharp and ugly under his voice.
The poor wretch sank under Randal's firm voice and steady eye.
Get some bottom under your voice so that you don't have to move from a whisper to a shriek quite so fast.
Under his voice, and hers, was a strain both of them pretended not to hear.
I watched from hiding until my prey emerged, stumbled, and came toward me singing hoarsely under his voice.
Harm her," he said under his voice, "and you will die.
He heard the careful pleading under her voice so he relented.