What is a noise filter?

[Hoagie_one]

I took apart a computer monitor for parts and where teh power cable plugs in is a small silver box with the power connector and its labeled a noise filter. 

Any idea?

[menace]

some appliances running on AC power in your home send errant frequencies in the power down the wires in your house--the filter suppresses them.

[Hoagie_one]

if i used this as a connector for a project, will it still work?

[menace]

I think so.