Materials like paper (including coated paper cones) and various polymers will generally ring less than metal diaphragms, but can be heavier and not as stiff.

The principle involved is the balancing of the engine cylinder pressure against a measured pressure on opposite sides of a metal diaphragm of negligible stiffness.

It passes through a narrow opening between a nozzle and a circular metal diaphragm in the power chamber, then out through the flaring horn bell.

But for the next lesson he presented Butch with a really thin metal diaphragm stretched across a hoop.

In March 1941, a metal diaphragm with a hole in it was fitted In the fuel line, restricting fuel flow to the maximum the engine could consume.

In an old-style telephone, the person speaking vibrates a metal diaphragm.

The remedy, invented by Beatrice "Tilly" Shilling, was to fit a metal diaphragm with a hole in it, across the float chambers.

She looked at the earpiece and blew some flour off the metal diaphragm.

It was a metal diaphragm attached to a needle, and this needle scratched a pattern onto a piece of metal foil.

When it presses against the metal diaphragm, rub it on a metal wall or pipe to ground it.