AP PSYCHOLOGY

Detailed explanation-1: -Each frequency of a complex sound maximally vibrates the membrane at one location. Because of this mechanism, we hear different pitches within the sound. A louder sound increases the amplitude of the vibration, so we hear loudness. Signals sent to the brain from auditory nerve are then interpreted as sounds.

Detailed explanation-2: -The tiny hair cells in our inner ear send electrical signals to the auditory nerve which is connected to the auditory centre of the brain where the electrical impulses are perceived by the brain as sound. The brain translates the impulses into sounds that we know and understand.

Detailed explanation-3: -Hair cells-sensory cells sitting on top of the basilar membrane-ride the wave. Hair cells near the wide end of the snail-shaped cochlea detect higher-pitched sounds, such as an infant crying. Those closer to the center detect lower-pitched sounds, such as a large dog barking.

Detailed explanation-4: -The inner ear translates vibrations into electrical signals. The electronic signals are carried into the brain by nerve cells called neurons via the cochlear nerve system. The signals travel along the cochlear nerve system to the brain’s cerebral cortex. Like a supercomputer, this part of the brain.