"It was only out of generosity, madame," he said in a resonant voice, "and because I would not betray a friend in an awkward position, that I did not mention this revision before; though you heard him yourself threatening to kick us down the steps.
There are no more uses of "resonant" in the book.
Show samples from other sources
The sound resonates well in this theater.
His story resonated with me because I once had a similar experience.