The hearing organs of the human body are the ears. The ears are responsible for detecting sound waves and converting them into signals that the brain can interpret. They are made up of three parts: the outer ear, the middle ear, and the inner ear. The outer ear is the visible part of the ear, which collects sound waves and directs them to the eardrum. The middle ear contains three small bones, which vibrate in response to the sound waves and transmit them to the inner ear. The inner ear contains the cochlea, which is filled with fluid and lined with tiny hairs that convert the sound waves into electrical signals that are sent to the brain.