How can your ears tell you in which direction a sound is coming?

Your ears can determine the direction of a sound thanks to two primary cues: interaural time difference (ITD) and interaural level difference (ILD). ITD refers to the slight difference in the time it takes for a sound to reach each ear, while ILD involves the difference in sound intensity between the ears. The brain processes these cues, allowing it to triangulate the sound's origin. Additionally, the shape of the outer ear helps filter sounds, providing further spatial information.