Ear potential that is transmitted along the spiral ganglion, which sends information through the auditory portion of the vestibulocochlear nerve to the temporal lobe of the brain. The human ear can generally hear sounds with frequencies between 20 Hz and 20 kHz (the audio range). Sounds outside this range are considered infrasound (below 20 Hz) or ultrasound (above 20 kHz) Although hearing requires an intact and functioning auditory portion of the central nervous system as well as a working ear, human deafness (extreme insensitivity to sound) most commonly occurs because of abnormalities of the inner ear, rather than in the nerves
Above and Below seeks to "recreate the experience and feeling" of the underwater landscapes through use of various thickness of wire. Three-fifths of the artwork depict the Bluespring Cavern with the last two sections depicting what is beneath the water level in the cave. "Above and Below" was fabricated at Walla Walla Foundry in Washington utilizing the bathymetric data gathered from the river bottom and cavern ceiling. Lin's studio translated the data into a collection of contour curves and then sent them to the Foundry. The aluminum tubing was carefully bent to match the computer-generated templates created by the studio then hung within