"Looking at the ear and how it works, it becomes immediately 
obvious that there is an awesome and very intricate process underlying our auditory sense. In fact, the human ear is one of the most intricate examples of miniature and sophisticated engineering on the planet.
Sound is a pressure disturbance in the air. Small cyclical vibrations of pulsing pressure (called ‘acoustic waves’) travelling through the air enter the opening of the ear canal and reach the eardrum (‘tympanic membrane’).
The resultant small vibrations of the eardrum are then transferred, through three tiny bones called ‘ossicles’ in the middle ear cavity, into the cochlea in the inner ear. Each stage of this system is staggering in its complexity.
Humans hear over a wide range (9 octaves) from about 20 cycles per 
second (Hertz = Hz) to nearly 20,000 Hz. Dogs hear from about 65–44,000 Hz (again over 9 octaves but shifted upwards compared to humans), while cats have one of the widest ranges of all—over 10 octaves, from 55 to 77,000 Hz.
Even in our twenties we begin to lose the capability of hearing very high frequencies (around 12,000 Hz and above). The human voice carries with it a raft of ‘harmonics’ (multiples of the fundamental frequency at which it is emitted—typically 125–400 Hz), which firstly extends the range at which it is heard, and ensures that each individual voice is unique.
This includes the voice of Christ Himself, which all creation obeys. This was demonstrated when He commanded the wind and the waves to obey Him in Mark 4—the same person who spoke all into existence in Creation Week!" CMI
For He spake, and it was done;
He commanded, and it stood fast.
Psalm 33:9
