bulrush
bullrush
common rush
soft rush
Juncus effusus

She was lying on the floor, hearing the soft rush of air through an open vent.

Then he heard a soft rush of air coming down the shaft.

The soft rush of the water seemed everywhere She spoke again.

Only the soft rush of the pumps could be heard.

She could hear the soft rush of water from a river where it tumbled over the rocks.

A moment later, the door panel slid open with a soft rush of air.

From the base of the cliff far below came the soft rush and break of the waves.

Ben turned quickly to call the dog away, and his words came out in a soft sidelong rush.

It was the soft rush of the river's waters that they had heard before.

Traffic was beginning, a soft rush sounding from the wider streets.