Twice he drew her down when a noise alerted him.

If there were any guards upstairs, the noise would have alerted them.

The noise of the fight must have alerted the people in the control room.

Certainly the inevitable noise made by dragging her body around would alert anyone out there.

The King also makes noise as he runs, being too loud will alert nearby characters.

Rule one: when walking in bear country make a noise to alert the animals to your presence.

The noise alerted a woman who came in from a side door and challenged him quite sharply.

The bike's noise would've alerted anyone in the House that something was up.

The noise alerted the workers laying the asphalt up ahead.

Light and noise would alert them if a ship returned.