Sound Localization
Humans are able to hear a variety of sound frequencies. Our ability to judge or estimate where a sound originates, called sound localization, is dependent on the hearing ability of each ear and the exact quality of the sound. Since each ear lies on an opposite side of the head, a sound will reach the closest ear first, and the sounds amplitude will be the loudest in that ear. Much of the brain's ability to localize sound depends on the interaural (between the ears) intensity and time differences in sounds. Bushy neurons can resolve time differences as small as ten milliseconds, or approximately the time it takes for sound to pass one ear and reach the other.