If it arrives at the left mic or ear slightly earlier than the right, then we know the sound is coming from the left, and so on.īut the human hearing system is rather more advanced than a simple spaced stereo mic array, not least because it can resolve sounds in three dimensions, rather than just the 2D plane of stereo audio. So, if a sound being picked up by a spaced array (or our ears) arrives at both mics (or eardrums) simultaneously, then we know it’s coming from directly in front of or behind us. Now, unlike coincident mic arrays such as X‑Y or Mid‑Sides, in which sounds always arrive at the two mics at the same time, spaced arrays rely on the possibility of sound arriving at the two mics at different times in order to convey positional information. omnidirectional) microphones, and since we’ve got one on either side of our heads, our hearing is essentially the same as a spaced‑omni stereo mic array. Our eardrums work an awful lot like pressure‑operated (ie. All Earsīinaural recordings are stereo recordings that take advantage of the mechanics of human hearing. However, as headphones have become the dominant consumer listening medium, it’s more relevant now than ever. It’s actually as old as the hills (some of the earliest experiments date back to the 19th Century!), but because binaural recordings need to be heard on headphones to get the full effect, it has had limited applications. Binaural recordings are an easy and effective way to capture immersive audio.īinaural audio is one of those techniques that the recording industry seems to rediscover every decade or two.
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