3D audio is a sound technology that creates an immersive listening experience by simulating how we naturally hear sounds in the environment. Unlike traditional stereo sound, which uses two channels, 3D audio can use multiple channels to place sounds in a three-dimensional space around the listener. This allows sounds to come from various directions, making it feel as if they are happening all around you. This technology is commonly used in virtual reality (VR) and video games, enhancing the realism of the experience. It can also be found in music production and film sound design, where it helps to create a more engaging atmosphere by accurately representing how sound travels in real life.