New Delhi, Dec. 5 -- CCTV cameras have become essential tools for monitoring homes, offices and public spaces. Over the years, they have evolved far beyond basic video capture. One of the most influential upgrades is the addition of audio, which dramatically changes how we interpret, respond to and manage security threats. The difference between one-way and two-way audio may appear minor on paper, but in practice it reshapes the entire security experience. Understanding this difference helps you select systems that deliver not just clarity but also genuine control.

One-way audio allows the camera to capture sounds from the environment but does not allow you to speak back. Its primary purpose is evidence collection. By capturing voices, f...