CD Players

1. / What industry was advantaged as a result of the CD player?
4. / Basic pattern of information transfer: Sound energy to electrical energy to _______ energy to sound energy.
5. / In 1984, Sony released _________ CD players.
9. / The first machine to use wax cylinders to record sound waves.
11. / Of the previous inventions used to play back sound, which is the most similar to the CD player?
12. / What company was the first to release the CD player?

2. Disk / What does CD stand for?
3. / The first machine to be able to play back sound.
5. / How were the indentations made, when recording sound to be played back on the gramophone, transferred from the original material to the metal disk used when playing back sound?
6. Beam / What is used to pick up the information that has been encoded onto the CD?
7. / Why was the tin foil replaced with wax cylinders for recording the pattern of sound waves?
8. Coding / What is the recorded sound converted into before the information is transferred onto a CD
10. / What material makes the CD player most harmful to the environment?