The nerves in the cochlea carry the sound signals to a certain part of the brain. The brain compares the sound with memories of other similar sounds that have been heard before. The brain will let you know what kind of sound it. This happens very quickly. Hz are not heard by the human ear.
Many animals have a wider range of hearing and therefore can pick up much higher sounds than humans.
The tone of a sound is caused by the type of vibration making it. The quality of sound depends on the material from which the sound producing instrument is made and the way it is played. We hear sounds with our ears. Vibrations move rapidly through the air towards our ears and make part of the human ear vibrate. Sound is heard because energy is transferred from the vibrating object to the ear.