LESSON 1 EXERCISES
In each of the following exercises, select the ONE answer that BEST completes the statement or answers the
question. Indicate your solution by circling the letter opposite the correct answers in the subcourse booklet.
Assume that you are receiving a long distance telephone call on the hand telephone set shown in figure 20. The
telephone system processes the sounds of the voice waves conquer distance by:
concentrating the amplified sound waves and transmitting them over wires.
transmitting the actual voice of speaker to a receiver.
transforming the speaker's voice power into electrical power for transmission to a receiver.
concentrating the power of sound waves and transmitting this power to a distant receiver.
Such terms as frequency, velocity, amplitude, pitch, quality, and wavelength are used to describe sound waves. In
figure 1-1 the characteristic indicated as X is the:
Figure 1-1. The sine wave.
As a telephone operator you are conducting a study of the velocity of sound waves and their variations through
different transmission media. The medium through which sound travels at the fastest rate is: