Physics of a Compact Disk

A detailed Summary of Physics of a Compact Disk

Compact discs are the most popular form of recorded musical entertainment. They have more memory than their vinyl predecessors as well as a smaller size. Compact discs are digitally recorded, unlike the analog-recorded tapes and LP records, so have a better sound quality. Because of the benefits of optically recorded compact discs, this form of musical technology has almost completely replaced vinyl records and cassette tapes. CD's are played optically by a compact disk player. Laser light beams read the binary codes encoded on the disk during recording, and the code is interpreted as sound or silence. The more binary numbers there are that are read as sound, the greater the intensity of the sound. The sound is transferred to the compact disc player's sound system and the music is amplified through the speakers.

Compact discs are digitally recorded using an optical recording system. Music, or sound, is recorded in analog form through a microphone placed near each instrument. The original sound signal is continuous and varies in pitch, or frequency, and volume. The microphone change

Compact discs have served as an example in creating similar forms of video and software technology. The optically and digitally recorded analog sound has inspired technology experts to use the same process in recording digital videodisks (DVD's) and CD-ROM discs. They have also cleared the way for additional forms of music technology, such as the micro disk, which is a smaller form of a compact disc, and electronically recorded Napster. With the technology to produce digital recordings from analog sound, the quality of reproduced sound will continue to improve.

After a compact disc has been recorded, it is ready to be played by a conventional compact disc player. A CD player reads the disc and translates the digital information into sound waves that are heard through the stereo system of the player. The intensity of the sound heard depends on the texture of the area the lasers read. A flat spot on the compact disc, or binary 0, is heard as silence, or no recorded sound. A pit in the disc, binary 1, is read as sound. The more binary 1's there are in a specific location, the more intense the resulting sound is.

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Some common words found in the essay are:
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Approximate Word count = 762
Approximate Pages = 3 (250 words per page double spaced)

Category: Science

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Physics of a Compact Disk

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