A few minutes passed and then came a most disturbing sound, like a moan from out of a nightmare.

Then came the disturbing sounds of an argument out in the corridor.

He was jerked back to reality by a strange and disturbing sound.

Other sounds, even more disturbing, came through some of the closed doors.

The disturbing sound came from directly behind him in the thickening smoke.

There were no disturbing sounds to cover noises that might occur within the house.

From the far side of the room came a new and disturbing sound.

He tried to laugh, but it was a dark, disturbing sound.

Now came a disturbing sound that attracted the murderer's attention.

He will be close at hand, perhaps awake to hear any disturbing sound.