They dropped back onto the sheet with little dull thumps.

I heard something hit the ground, a dull, heavy thump.

Ruth was walking away when she heard a dull thump against the window glass.

A dull thump I had heard before came from the attic.

Then the beam he had moved shifted again with a dull thump.

A heavy body crashed against a wall, followed by a dull thump.

A dull thump which seemed to shake the whole building.

He checked his clock and felt a dull thump of surprise.

Silence and then a dull thump coming, it seemed, from the back of the house, Below.

A dull, heavy thump was followed by the sound of something rolling.