Finding and Fixing Ground Loops in AV Systems: To eradicate noise in audio and video systems, go straight to the source

摘要

The ultimate goal of sound and image reproduction is realism-the kind that creates suspension of disbelief in the listener or viewer. And nothing breaks the spell like background buzz during a quiet musical passage or a suspense-filled moment in a movie. No matter how good the reproduction technology is, interference can really spoil the experience. While professionally balanced interfaces largely preclude noise problems, most audiophile and home theater systems consist mostly, if not entirely of audio and video equipment with unbalanced inputs and outputs - a danger zone for signals. In all but the smallest systems, which use very short cables, noise problems are likely to exist. Nevertheless, there are ways to combat this problem and minimize its effects on your customer's audiovisual systems, which, in turn, improves their listening and viewing pleasure.