Another excerpt from Revelation: The Epiphany of Cassandra Philips

Mark Poncy’s Blog
Another excerpt from Revelation: The Epiphany of Cassandra Philips

Each chapter of this novel begins with a consideration of a sensory organ within the developing embryo (see prior posts) Here’s the one on the apparatus of hearing:

Within the temporal region of the developing animal’s head, construction continues on structures that would funnel yet another form of energy from the environment into the organism, appraising it of information that will increase its awareness, and therefore the odds of its survival. Potentially threatening movement through the surrounding world would always involve some mechanical disruption, creating energy that is transmitted in the form of sound waves. The hearing apparatus would be meticulously fashioned to capture this flow of energy, warning of approach hidden under the cover of night, or otherwise camouflaged from visual detection.

In parallel with the bilateral placement of its eyes, the twinned ears, located on either side of the head, will receive acoustic information at times and strengths slightly variant with respect to one another, enabling the auditory cortex of the brain to calculate the direction from which the sound emanates. With sonic energy traveling at the speed of over one thousand feet each second, this difference, while less than a millisecond, is well within the discriminating powers of this finely-tuned system.

Because of the tendency of sound to rapidly decay during its propagation through the atmosphere, a specialized apparatus providing amplification of acoustic energy is forming within the middle ear. Three delicate bones arranged uniquely will offer mechanical leverage to the most minute stimulus, bringing the footfall of the padded paw into the realm of detection. At the same time, a powerful muscle begins to invest the delicate structure, one that will reflexively activate upon the arrival of loud and potentially damaging sound, immobilizing the apparatus, keeping it from shattering under its own resonance. Thus will the organism react to an enormous range of sonic energy, from the click of the turning key to the assaulting power of the cannon’s roar.

Deep within the structure of the ear, the snail shell-like cochlea is forming, a remarkable fluid-filled chamber lined with fine cilia, tiny hairs whose roots impinge upon the delicate curling branch of the auditory nerve. Tapering to microscopic thinness along its concentrically-wrapped length, the cilia vibrate in ratio to the pitch of the conducting sound, betraying its nature, from the threatening howl of the stalking wolf to the plaintive mourn of the maestro’s cello. Once again, it will all happen according to plan, a manifestation of instructions dictated by the linear order of chemicals splayed within the invisible nucleus of each invisible cell.