Hearing range 60 decibels, the hearing range for the Senegal bushbaby is 92 Hz–65 kHz, and 67 Hz–58 kHz for the ring-tailed lemur. Of 19 primates tested, the Japanese macaque had the widest range, 28 Hz–34.5 kHz, compared with 31 Hz–17.6 kHz for humans. Cats have excellent hearing and can detect an extremely broad range of frequencies. They can hear higher-pitched sounds than humans or most dogs, detecting frequencies from 55 Hz up to 79 kHz. Cats do not use this ability to hear ultrasound for communication but it is probably important in hunting, since many species of rodents make ultrasonic calls.
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