Still others, especially the percussion instruments, are struck by hammers that move when the air pressure changes.
The heavy fabric of the suit was stiff, and the air pressure gave further resistance that had to be overcome.
Glancing about, he located the gauges that reported the air pressure beyond.
Before breaking out of rock, it was necessary to have air pressure in the tunnels.
You can let go of the cardboard now, as the air pressure will hold it up.
This barometer can be made so sensitive as to indicate the change of air pressure from a table top to the floor.
The force of the wind was dropping rapidly; so was the air pressure.
The air pressure gauge was spinning up toward normal sea-level air pressure.
They feel the air pressure; the tremendous noise grips them.
Changes in air pressure are very closely connected with changes in the weather.