3.5. 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

3.7. Read the following words and word combinations and try to guess their meaning.

Digital, primary, store, playback, upload, download, reason, convert, feature, miniature, codec, compressed, file, rechargeable battery, user-replaceable, headphones, external, control, track, browse, button, scroll-wheel, sound level, set, temporary, permanent, select, range, contain, touch- screen, volume.

3.8. Read the following words and notice their pronunciation.

miniature	[`mInICq]	install	[In`stLl]
damage	[`dxmIG]	announce	[q`nauns]
environment	[In`vaIrqnmqnt]	commercial	[kq`mWS(q)l]
tinnitus	[`tInItqs], [tI`naItqs]	sequence	[`sJkwqns]
permanent	[`pWmqnqnt]	associate	[q`squSIeIt]

3.9. Match the words in column A and B to make the expressions.

1. remote	a. supply
2. integrated	b. wave
3. power	c. current
4. alternating	d. line
5. radio	e. timer
6. alarm	f. clock
7. washing	g. control
8. clock	h. circuit
9. assembly	i. diode
10. germanium	j. machine

Memorize the following words and expressions

to refer to as	называться	digital sampling	цифровая выборка, дискретизация
consumer	потребитель, покупатель	sequence	последовательность
portable	переносной, портативный	embedded processor	встроенный процессор
support	поддержка	jack	гнездо, розетка, пружинный переключатель
to announce	объявлять	to skip	перепрыгивать, перескакивать
attendant	сопутствующий	to provide	обеспечивать, снабжать, давать
to spread	распространять(ся)	quality	качество
to install	устанавливать	suitable	подходящий
handset	телефонная трубка, мобильная трубка	hearing damage	нарушение слуха
stand-alone	автономный	to put at risk	рисковать
codec	кодер, декодер, алгоритмы уплотнения, разуплотнения данных	tinnitus	шум в ушах