Getting rid of "hum" in sound background

[SSH]

Since hums are often due to mains-powered electronic equipment, you can often do better on a battery-power recording device than on a plug-in one.

[foz]

http://www.littlemusicclub.com/steps/GrassyStep4.wav

try this out.........


There are lots of other sfx on this site too..........

http://www.findsounds.com

as stated your record level was probaly to low/or a dodgy lead or power supply.

[FlyRider]

Have you tried a noise gate?