All the while, the same distant hum of the engine plays in the background.

Even the distant hum of the drive seemed to dim.

There was a distant powerful hum which lasted a second and then stopped.

A distant hum was the only evidence of the massive power that could be unleashed from the room.

In a few moments the echo of its distant hum died away.

There was a distant hum and they all looked up as a machine appeared in the sky above.

But just ahead there was more light, and the distant hum of traffic.

Jason heard a distant hum and looked up at the sky.

The sounds of the market had retreated into a distant hum.

Except for the occasional siren, the city is a distant hum.