Binaural recordings are made by placing microphones directly in one's ear, capturing the sound that reaches the pinnae. By playing back the recording through headphones, one ensures that each of the listener's ears get the exact same signal as originally captured. The result is immersive and truly surprising, but only works with headphones.

Our test signal consists of a binaural recording of someone knocking on wooden doors. When comparing headphones, judge how realistic the recording sounds: do you feel as if the doors are right next to you? Does it sound like real wooden doors?