Her voice shook a little, but she had to ask.

The man's voice shook from the other side of the table.

His voice shook, but perhaps only he could hear it.

Her voice was shaking a little as she put the important question to him.

My voice did not shake, though by rights it should have.

Her voice shook slightly at the look in his eyes.

Her voice was shaking by the end of the speech.

It would have helped if my voice hadn't been shaking.

When he was finally ready to speak, his voice didn't shake.

His voice shook, but he was offering what no one else wanted to offer.