Whether to enable Pulseaudio's echo cancellation filter.

The term packet filter originated in the context of BSD operating systems.

The efficacy of a carbon filter is also based upon the flow rate regulation.

Air is drawn through a HEPA filter and blown in a very smooth, laminar flow towards the user.

So, now, what I want to do I'm going to put the middle nine surfaces here under yellow illumination by simply putting a filter behind them.

LifeStraw is a water filter designed to be used by one person to filter water so that they may safely drink it.

The filter is placed on a petri dish containing M FC agar and incubated for 24 hours at 44.5 C (112.1 degrees F).

Apache Mobile Filter or AMF, is an open source project created by Idel Fuschini and distributed under the GNU General Public License (GPL).

And then I put some ultraviolet filters on my camera and took a very, very long exposure with the particular frequencies of ultraviolet light and this is what I got.

Because a matching filter on the camera lens screens out only the backing color, the background area records as black, which, on the camera s negative film, will develop clear (fig.

And so even though there were no cars still in the West Village where we lived, my wife sent me out to buy a, you know, a large air filter at the Bed Bath and Beyond, which was located about 20 blocks away, north.

Too much of the world lacks access to clean drinking water. Engineer Michael Pritchard did something about it inventing the portable Lifesaver filter, which can make the most revolting water drinkable in seconds. An amazing demo from TEDGlobal 2009.

I think there's something poetic here, that these pictures taken with ultraviolet filter, the main use of that filter is for astronomers to take pictures of Venus actually the clouds of Venus.