Exercise 1. Answer the following questions.

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1) How many basic systems for recognizing a person’s touch do you know? Name them.

2) Of what components does the resistive system consist?

3) What is the structure of the capacitive system?

4) Why does the charge on the capacitive layer decrease?

5) In what way are the transducers placed in the surface acoustic wave system?

6) In what other area do the systems differ?

7) What is the cheapest system? What is the most expensive system?

Exercise 2. Say True or False.

1) In the resistive system the electrical current runs through conductive and resistive metallic layers while the monitor is operational.

2) The coordinates of the point of contact are calculated by the computer because of change in the electric field.

3) In the capacitive system, a layer that stores electrical charge is placed under the glass panel of the monitor.

4) When a user touches the monitor with his or her finger the charge on the capacitive layer increases.

5) Resistive system transmits almost 90 percent of the light from the monitor, whereas the capacitive system only transmits 75 percent.

6) In the surface acoustic wave system, reflectors reflect light.

7) 100-percent light throughput and perfect image clarity make the surface acoustic wave system best for displaying detailed graphics.

8) The resistive system and surface acoustic wave system allow a touch with almost any object.

Exercise 3. Match each word with its meaning.

1) coordinate a) the maximum amount that something can contain

2) capacity b) a fixed reference line for the measurement of coordinates

3) throughput c) any of a set of numbers that defines the location of a point in space

4) axis d) a device that converts variations in a physical quantity, such as pressure or brightness, into an electrical signal, or vice versa

5) transducer e) the quality of being easy to see or hear; sharpness of image or sound

6) clarity f) the amount of material or items passing through a system or process

Exercise 4. Give the Russian equivalents.

1) scratch-resistant layer

2) in the exact spot

3) electrical field

4) point of contact

5) to decrease

6) x and y axes

7) to locate

8) perfect image clarity

9) detailed graphics

10) rubber ball

10) to make contact

10) image clarity

Exercise 5. Give the English equivalents.

1) поверхностная акустическая волна

2) заряд передаётся пользователю

3) проводящий слой

4) изменение в электрическом поле

5) расположенные в каждом углу

6) относительная разность

7) отражать электрический сигнал

8) снижение качества

9) чёткость изображения

10) замыкать контакт

11) ёмкостная система

12) датчик и отражатель

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