Kilobytes Megabytes Gigabytes. The size of information in the computer is measured in kilobytes, megabytes, gigabytes, and terabytes. In this section, we'll look at common sizes you would see in real life, and work some arithmetic. Any thinking person today should have a rough idea of what KB, MB and GB are.
The maximum upper range of human hearing is about 20 kHz for children, declining to 15-17 kHz for middle-age adults. The top end of a dog's hearing range is about 45 kHz, while a cat's is 64 kHz.
Sharks hear sounds with frequencies ranging from 10Hz to 1KHz, and are especially responsive to sounds 500Hz or lower. In tests, the inventor found that sharks will not come within five feet of the noisy device, which if worn by swimmers, could protect them in the water (illustrated)