We know 3D and 360 audio, but 8D audio?
To understand how it works. First, we have to explain what is binaural.
Binaural is a recording technique to capture stereo audio that is simulate the sound waves exactly as your ears hear. The picture below explained what that means.
In the picture is the microphone popularly used to create binaural recording. The ear shape cover redirect the sound wave before it reaches the microphone inside. It works exactly like our ears. This creepy looking head below was used for the Beck's concert on 2013 to capture the sound for their 360 cameras.