The old heater kept whoofing in the middle of the night, waking everyone.

whoof! The dog barreled into the room, shaking off the rain and scattering papers.

At dawn the old steam engine would whoof as it started to move.

The dog greeted me with a loud whoof at the door.

When the mail finally arrived, the dog whoofed in relief and wagged his tail.

The old radio emitted strange whoofs during the storm.

When the doorbell rings, the big dog whoofs loudly and wakes everyone.