Read the following sentences and deсide if they are true (T) of false (F).

1. It was Alexander Bell who produced the first working model of a phonograph.

2. A phonograph was manufactured in 1887.

3. Edison concentrated his efforts on discs.

4. Bell produced sound from wax instead of tinfoil.

5. Recording industry became a kind of entertainment.

6. A compact disc system was introduced in 1980s.

7. A laser optical mechanism gives near-perfect reproduction of sound.

8. The quality of sound in CDs greatly deteriorate with use.

9. Crackle is not caused by dust and static.

10. Scratches on the recording surface contribute to “jumping”.

11. By 1990 sales of CDs exceeded sales of LPs.

12. Cheapness of CDs is responsible for the increase in sales.

3.6. Answer the questions to the text.

1. What is Thomas Edison famous for?

2. What is a phonograph?

3. How was the sound recorded: on the foil or on the disc?

4. What did Edison concentrate his efforts on? Why?

5. How did Bell modify tinfoil phonograph?

6. What gives better audio fidelity: disc recording or cylinder recording?

7. Are there any advantages with (or: of?) the disc system?

8. How is the sound reproduced on vinyl records?

9. What is a recording capacity of LP record?

10. What is a digital recording system?

11. Does the sound quality of CD deteriorate with use?

12. What are the problems with vinyl records?

13. How are the pits arranged?

14. How many circular tracks are there on a CD?

15. What is a recording capacity of a CD?

16. What is DAC?

17. What is the reason for the increase in CS sales?

Text B

Digital Audio player

Pretext exercises