She could hear the faint underlying drone of machinery in the distant background, but no one spoke.

A faint drone came from the mouth of the fireplace.

They could hear the faint drone of cars on the turnpike.

The ship was silent, except for the ticking of the machine and the faint drone of a fan.

They could hear the faint drone of the Eye's motors as it changed position.

He had walked several miles when he became aware of a faint drone.

And then there came the faint yet distinctive drone of cruisers.

There was a faint drone from overhead, growing louder.

As they emerged into the night air, the faint drone of a boat engine reached their ears.

The sound of the thinny was down to a faint drone behind him, and would soon be gone completely.