How It Works
Like a full-size CD player, a portable CD player reads the bumps and grooves using a laser. With its photocell (a device that detects any sort of light reflection given off of certain area), it determines whether there is a reflection of light given off from the CD when the laser hits. Depending on the light reflection, the photocell will return a 1, if there is no reflection, or a 0, if there is any light refection. When its laser hits a groove on a CD, it will not reflect any light, making it a 1. When its laser hits a bump or any other surface on the CD, a light reflection will appear making it a 0. The series of data from 0-1 on the CD is then transformed by a digital to analog converter, to recreate the shape of a sound wave. The headphones then amplify the sounds and then the audio is now able to be heard.
Read more about this topic: Portable CD Player
Famous quotes containing the word works:
“They that go down to the sea in ships, that do business in great waters, these see the works of the Lord and his wonders in the deep.”
—Bible: Hebrew Psalms, 107:23-4.