History
Audio signals are sound waves—longitudinal waves which travel through air, consisting of compressions and rarefactions. These audio signals are measured in bels or in decibels. Audio processing was necessary for early radio broadcasting, as there were many problems with studio to transmitter links.
Read more about this topic: Audio Signal Processing
Famous quotes containing the word history:
“the future is simply nothing at all. Nothing has happened to the present by becoming past except that fresh slices of existence have been added to the total history of the world. The past is thus as real as the present.”
—Charlie Dunbar Broad (18871971)
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—Henry David Thoreau (18171862)
“History does nothing; it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this.... It is not history which uses men as a means of achievingas if it were an individual personits own ends. History is nothing but the activity of men in pursuit of their ends.”
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