The sound of his voice in the closed can startled him.

He hadn't meant to say it, and the bleak sound of his own voice startled him.

The sound of the camera hitting the floor startled her.

But because I'd detected no signs of life around the place, the sound startled me.

The sound of her voice startled him, and his hand jerked a little on the wheel.

At other times the sound would have startled her: now it broke the spell.

The sound of someone coming in startled the grin from her face.

The sound of his own voice startled him into motion.

I laughed out loud so that the sound of my own voice startled me.

He could tell the sound of his voice startled her.