I don't know whether he understood but my tone must have expressed my gratitude.

His tone expressed neither rejection nor command, but rather something that sounded like necessity, and she bowed to it without question.

"Well, there are no better in all the High Reaches," and his tone expressed utmost disdain.

And the characters, structure, style and tone of his stories express that conservatism perfectly.

Her tone expressed more gladness than a shout.

The orderly's neutral tone nonetheless expressed concern about Gerswin's less than formal position, but he did not lean forward.

His tone expressed satisfaction in the fact that a human being had been blown to atoms.

Her tone expressed anything but the meaning of her words.

His tone expressed no wish for the information, merely a weary disbelief.

Her tone of voice expressed considerable doubt about this being our wish.