Is there a word or expression that describes a person who avoids speaking too loudly?
As in: After dating a girl who spoke so loudly all the time I had to frequently remind her to use her "inside voice", it is such a pleasure to be with Sally because she is so _________ and easy on my ears.
Words like "polite" and "courteous" come to mind, but they refer to an overall demeanor that is pleasant to be around. If there isn't a single word or expression that indicates that someone avoids speaking too loudly, what would be a succinct way to describe this?