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Showing posts with the label the human ear

NATURE HAD IT FIRST

NATURE HAD IT FIRST In 1973, Dr Martin Copper was the first to demonstrate a hand-held cellular telephone. It had a battery, a radio and a micro-processor [a minicomputer]. New Yorkers gaped in amazement when they saw cooper making a phone cell on the street. But the invention was possible only because back in 1800 Alessandro Volta had invented a reliable battery. In addition, the telephone had been developed by 1876, the radio by 1895, and the computer 1946. Finally, the invention of the microprocessor in 1971 made cell phones possible. Nevertheless, we might ask, was communication with sophisticated devices really new? A communication device often taken for granted is the human voice. Over half the billion of neurons in the motor cortex of your brain are involved in controlling your speech organs, and about 100 muscles operate the complex mechanism of your tongue, lips, jaw, throat, and chest. Although some animals can hear sound frequencies beyond the range of human hearing, the