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.
The pitch of a sound is directly related to the frequency of the vibrations of its waves. People with excellent hearing can hear very low sounds, vibrating about 20 times per second, all the way up to high pitches with frequencies of 20,000 vibrations per second. Other animals can hear sounds at higher vibrations.