How a CD works Compact disc (CD) players have increasingly replaced the phonograph and the cassette tape. They offer a clear, crisp sound, faint background noise, and have the additional advantage of longer life. In addition to their audio content, some compact discs contain digital graphics that can be displayed on a television screen. To understand how a CD works one must understand what a CD consists of. A CD is about 1.2 millimeters thick. Most …
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showed last 75 words of 483 total
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