His instruments whirred softly as he ran the scanner down her arm.

The lens whirred softly as it telescoped to its full length.

Austin hit the starter button and the engine whirred softly.

At her command, the heat began to whir softly through the vents.

As the film whirred softly, Tom kept his ear close to the wall.

The machine whirred softly and the large screen came to life.

Tom pushed a button and the Damon-scope began to whir softly.

Most curious were the softly whirring fins on each side.

The mechanism whirred softly and a brightness appeared in the air above the platform.

Electronics whirred softly in the belly of the great tank.