Bare copper spiral

Except the outer jacket that protects against physical damage a cable also has a shielding for protection against external signal interferences. These interferences may corrupt data transfer or create unwanted noise in an audio signal. Different types of shielding are used, as they differ in their specific advantage in protecting signal frequencies.

Bare copper spiral is even more flexible than a braided shielding. This type of shield is constructed by wrapping the shield material in one direction around the conductors. Spiral shields are most effective in the use of cable where audio signals are transmitted.