Not changing, incapable of being changed, or unable to take place during some period of time, usually while a system or device is in operation or a program is running. Compare dynamic.
Electronics and Electrical Engineering
1. Unwanted random noises produced at the loudspeaker of a radio receiver. It is usually heard as an unpleasant crackling sound and is caused by atmospheric conditions, usually by the presence of static electricity in the air through which the radiowave is propagated.