CEVAP:

The auditory system uses both monaural (one-eared) and binaural (two-eared) cues to localize sound. Each ear interacts with the incoming sound waves differently depending on the sound source. For example, the sound from the left side reaches the left ear right before it reaches the right ear. The source of voice is determined by comparing the time of arrival between the two ears and the intensity of the voice. When the voice is in a low pitch, the time to reach the ear provides more meaningful information. However, when the voice has a high pitch, the intensity provides more valid and meaningful information.