For the first time, Jan became concerned, and her voice showed it.

But his voice showed that he had no such hope.

He hoped his voice had shown no signs of fear.

It was the first time his voice had shown any emotion.

He was feeling some strain now, and his voice showed it.

She turned again, and her voice showed a little embarrassment.

The voice on the other end of the line showed annoyance.

My voice didn't show the trembling at all, it was empty.

At the same time, her voice was showing signs of wear.

But his voice showed no sign of the rage he must have felt.