Inside,the,Compact,Disc,Everyo technology Inside the Compact Disc
Active shredder safety technology for the small office. Shreds 15sheets per pass into 5/32" x 1-1/2" cross-cut particles (Security Level3). Patented SafeSense® Technology stops shredding when hands touch thepaper opening. Designated shredde The electronic cigarette is not new. People who buy electronic cigarette knows that this product has been in the market for years now. Despite some sectors apparently trying to shoot the product down from the shelves, the popularity of elect
Everyonehas seen a Compact Disc, heard music played from one, or used one to storefiles digitally. Not many people know how they work though. The CD is a modernmarvel of science that is a true testament to the tenacity of the human spiritand ingenuity.Creating aCompact Disc is also a more involved process than many people realize. The datais recorded onto the disc in microscopic increments which means that duringproduction, even the smallest particles of dust will cause the recordings to becorrupted. The manufacturing process must be very accurate and precise because thereis no room for error.Turning Binary into SoundThe firstchallenge was developing the disc itself. Optical discs must be able to containhuge amounts of data because it takes around a million bits to playback onesecond of music. Fortunately, one million bits on a Compact Disc is about thesize of the head of a pin. This made optical discs the ideal way to store thedata for later retrieval. Another challenge was inventing a way to read backall of the compressed information on the CD fast enough to play back soundcontinuously, which was made possible by integrated circuit technology.When a newaudio CD is needed, a glass master must be created first. It is inspectedcarefully for quality assurance because a flawless master is what is reallyneeded to manufacture good replicas. Once the glass master is finished, astamper is created that is loaded into an injection molding machine, where theactual replicates are created. Through every step of the manufacturing process,quality and precision must be solidly maintained at the risk of creating waste.A CompactDisc plays the sounds back in a system of groves laid out in a spiral over thesurface of the disc. When the laser from the CD player moves along the spiral,it will encounter pits and lands that cause the laser to be reflected backat various intensities to the reader. The computer inside the CD playerinterprets this data as sound. Using this method eliminates the fuzz that youmight hear on some older audio recordings, making CDs one of the most highquality audio formats around to this day.Alternate MethodsTheoriginal formats laid out in the Red Book created by Sony and Philips wereeventually discarded by many in order to produce audio CDs that were in excessof 79.8 minutes and in order to allow for digital rights management (DRM). Overthe years compact discs have become available in 74, 80, 90, and 99 minuteversions. The 80 minute CD (which is actually 79.8 minutes) is currently thestandard size. However, the more music a compact disc can hold, the tighter itsspiral must be (which allows for more playback). Not all CD players can handlethe tighter spirals, especially the older CD players that existed before thehigher capacity discs hit the market. Eventually though, manufacturers updated theirproducts and now you are much less likely to have problems playing 80 minute discs.The 99 minute discs are another story though. Your best bet is to avoid them.
Inside,the,Compact,Disc,Everyo