Question

easily explain how the brain localizes higher-frequency sounds.

Answer 1

Sound localization is achieved based on the cues for the sound that are intensity and time level differences between the ears  

Based on the cues the auditory system when sound waves hits the pinna and concha of the exterior ear and enters into the ear canal. The sound waves vibrate the ear drum which causes three bones of the middle ear to vibrat and that sends energy through the oval window and than into the cochlea and will be changed into a chemical signal by hair cells in the organ of Corti and that is percieved by spiral ganglion fibers that travel through the cochlear nerve into the brain.

Once percieved the spatial and temporal analysis and intensity analysis helps the Brian to localise the sound