Interaural Level Difference (ILD) refers to the difference in sound intensity that reaches each ear when a sound source is located to one side of a listener. This phenomenon occurs because the head creates a sound shadow, causing the ear closer to the sound to receive a louder signal than the ear farther away. ILD is an important cue for human auditory localization, helping individuals determine the direction of sounds in their environment. The brain processes these differences in sound levels to identify the location of the sound source, enhancing spatial awareness and the ability to navigate through complex auditory landscapes.