There are a few things that pass message from the ear to the brain. The most likely answer is the ear canal.
messages sent by the nerves
brain
retina
Your eardrums take fluctuations of the air pressure on your ears and converts them to electrical pulses, which are sent to the brain. The brain then interprets the electrical signals as different sounds.
The brain does not control your bones, your bones are more or less static. They are moved by muscle contraction, which is triggered by electrical signals sent from your brain. The fact that your bones are connected to flexible joints is what allows your muscles to move them.
Skeletal muscles are attached to the bones by tough cords called tendons. When nerve signals are sent from the brain and spinal cord, these muscles contract to produce movement.
Quite a few, depending on what sensation you're interested in, but the cribiform plate is actually a part of the brain (the olfactory lobe), the only part of the brain that connects to the outside world directly.
sensory nervous system. Each sensory organ contains millions of receptor cells (dendrites) that send cell signals to the brain through the process of cell signaling. in some cases signals are sent directly to the spinal cord.
The brain
Your eardrums take fluctuations of the air pressure on your ears and converts them to electrical pulses, which are sent to the brain. The brain then interprets the electrical signals as different sounds.
Light rays of differing wavelengths enter the eyes and strike the retina which converts them into electrical signals, these signals are sent to the brain where they are reinterpreted as colours and images.
They are sent through your nervous system by electric pulses from your brain
In most cases signals are sent to the brain through the nervous system. Individual signals are transfer from neuron to neuron in the form of chemical and electrical energy that eventually reach the brain.
The spinal cord handles electrical signals sent between the brain and the rest of the body.
Sight involves light entering the eye and being focused by the lens onto the retina, where light-sensitive cells called photoreceptors convert light into electrical signals that are sent to the brain through the optic nerve. Hearing involves sound waves entering the ear and traveling through the ear canal to the eardrum, causing it to vibrate. These vibrations are then transmitted by the ossicles in the middle ear to the cochlea in the inner ear, where hair cells convert the vibrations into electrical signals that are sent to the brain via the auditory nerve.
The inner ear is responsible for converting sound waves into neural impulses that are sent to the brain.
electrical impulses
efferent
The brain does not control your bones, your bones are more or less static. They are moved by muscle contraction, which is triggered by electrical signals sent from your brain. The fact that your bones are connected to flexible joints is what allows your muscles to move them.
The TV is created using science, the shows are recorded using science, even the signals are sent from the TV station to your house using science. If you want to go further, the light being emitted by the tv is traveling through the room to your eye. In your eye, rods and cones are translating that light into electrical signals that are then sent to your brain, which decodes those signals into what you see.