He seemed to have been running from or to something ever since his voice had changed.

Her voice didn't change at all; she might just as well have been talking to me.

Quite suddenly, he let me go and his voice changed.

She was still looking at him, but her voice changed.

Then her voice changed and she came back to the present.

When she wanted to get away from me her voice and language changed.

He watched them for a moment, then his voice changed.

When I finally grew up, my voice changed just like other people.

Her voice had not changed, despite the nature of that threat.

This voice, though, had not changed since the first time he'd heard it as a child.