Humans have depended on their sence
of hearing for millions of years. It
is the way that humans receive their main way of communication:
Hearing is what people depend on to help them communicate with
certain objects, like the phone, and many other things. We have
steps in improving and preserving human hearing, but to understand
hearing you must understand how hearing itself works.
In humans and other mammals, the auditory
receptors are found in the inner
ear and the whole structure for hearing consists of the outer
ear, the middle
ear and the inner ear.
The outer ear consists of three important components, the pinna
or the ear
itself, the auditory canal and the tympanum or the eardrum. Most
able to move their pinna in order to pick up the source of the
sound and to
maximize the sound input.
The middle ear consists of mainly bones, the three important
malleus, incus and the stapes. These three bones are also known
hammer, anvil and stirrup respectively due to their functions.
together as a jointed lever, these bones transfer the vibrations
eardrum to a thin membrane in the inner ear.
The inner ear consists of the cochlea, which is the lengthy fluid-filled
tube, which is coiled like a snail shell, and the vestibular
cochlea is U-shaped and contains sensory neurones involved in
hearing. At one
end of the cochlea is an oval window to which the stapes is affixed
other end contains the round window.
Sound striking the eardrum is transferred by the bones in the
middle ear unto
the oval window of the cochlea, causing the fluid in the cochlea
In the middle of the cochlea is the organ or Corti. Auditory
found in this organ which converts the vibrations in the fluid
of the cochlea
into impulses which are then transmitted by the auditory nerve
to the brain
where the impulses are interpreted.
Now that we know how the human ear works
above water lets take a look at how
it works below water.
There are two ways of hearing: air conductivity
and air conductivity.
Underwater, humans use bone conductivity because there is no
air in the
water, so the ear cannot pick up sound waves because eit has
water in it,
thus air conductivity is useless underwater. This means that
underwater through vibrations in the bones. Through bone conductivity,
can pick up sounds of greater tonality underwater than above
means that above water, humans can pick up sounds with a lower