Triboelectric noise is noise generated in a shielded cable due to variations in capacitance between the shielding and the conductor as the cable is flexed.
Triboelectric noise is unwanted electrical noise generated within a shielded cable when it is flexed or moved. As the cable bends, the physical relationship between the shield and the conductor changes, varying the capacitance between them and causing small charges to be generated and redistributed. These charges appear as noise in the signal, which is especially troublesome in cables carrying low-level signals where even small disturbances matter.
Because the noise arises from mechanical movement, triboelectric noise is a concern in cables that flex during use, such as those connected to moving equipment or handled frequently. Special low-noise cable constructions, which include a conductive layer that bleeds off the generated charges, are used to minimize this effect.
In commercial and industrial systems, triboelectric noise can degrade sensitive measurements and audio if not controlled. Recognizing the phenomenon helps in understanding why low-noise cable construction matters for flexing, low-level signal applications.
Because the noise arises from mechanical movement, triboelectric noise is a concern in cables that flex during use, such as those connected to moving equipment or handled frequently, with special low-noise cable constructions including a conductive layer that bleeds off the generated charges.
Such low-noise constructions are valued in sensitive, moving applications.
At Windy City Wire, an understanding of noise sources like the triboelectric effect supports the value of low-noise cable construction. Recognizing how flexing generates noise in shielded cable helps illustrate the considerations behind cable designed for sensitive, moving applications.