Compact discs

Compact discs

T515/0199 Rights Managed

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Credit: ALAN L. DETRICK/SCIENCE PHOTO LIBRARY

Caption: Compact discs. Assortment of compact discs (CD's). Each disc stores audio data such as music, as a series of fine depressions, representing a digitised musical signal capable of being read by a laser. To reflect the laser light, the music layer is coated with a fine film of metal which follows the depressions exactly. This layer is covered by another layer of transparent plastic which prevents dust and scratches from affecting the sound quality.

Release details: Model release not required. Property release not required.

Keywords: audio sound, cd, communication, communications, compact disc, technology

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