Digital Audio and Your Security System

Just like old-time movies had no sound, the first surveillance cameras were just video. Adding sound to the movies provided that additional feeling of reality to their entertainment. Adding sound to security systems increased our safety. The sound provided better clues about what we were seeing. For example, if we saw two people together, we would react differently if we heard laughing or yelling.
Audio technology provides a flexible enhancement to security. From speakers attached to cameras to paging systems and apartment intercoms, this article reviews the integration of audio into a security system.
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