Why do we have two ears instead of one?

Answer: To locate where sounds come from

To hear twice as loudly — Wrong. Two ears don't make sounds twice as loud. They make sounds slightly louder (only about 3-6 decibels more than one ear), but the primary advantage is directional hearing. Your brain compares tiny timing differences (microseconds) and volume differences between ears to calculate where sounds originate—critical for navigation and survival.

To locate where sounds come from ✓ — Correct! Two ears enable sound localization through the 'interaural time difference' (sound reaches one ear microseconds before the other) and 'interaural level difference' (sound is slightly louder in the closer ear). Your brain compares these differences to determine direction and distance. This 3D hearing was important for hunting, avoiding predators, and spatial awareness.

One ear for music, one for speech — Wrong. Both ears process all types of sounds equally—there's no specialization where one handles music and another speech. Both ears send signals to both brain hemispheres. The brain's left hemisphere tends to process speech more, while the right processes music more, but this is brain processing, not ear specialization.