She always worried that every unusual noise meant the tail was about to fall off.

At breakfast she asked if any one had heard any unusual noise during the night?

It was, after all, a most unusual noise to hear on Vulcan.

All four guards were down, without a single unusual noise to warn anybody.

He knew how it felt to be alone in the forest, running, afraid of every tree shadow or unusual noise.

But I'm not sure how good they are with too many people about or unusual noise.

"Have you heard any unusual noises in the past few minutes?"

The bulls might get frightened with all the unusual noises around them.

Hearing an unusual noise, he turned and saw a tractor bouncing across the field.

If he made no unusual noise, he could pull it off.