There were heavy curtains at each end of the hall; The Shadow knew that no noise could have penetrated.

The noise of phaser fire penetrated the chamber and sang through the thickening air.

The noise penetrated into the editorial sanctum, losing only a small part of its strength on the way.

Then noise, sight, and color penetrated her awareness.

But, even with the door shut, the loud noise of the party might penetrate.

These noises penetrate even into hospitals, which are designed to be quiet.

It was quieter up here, though the noise from below still penetrated, a dull, steady background of celebration.

Sometimes eerie noises penetrated the walls, as of alien creatures hunting or struggling.

The noise obviously wasn't penetrating to his quarters.

A palpable noise was penetrating the walls of the operating room.