20. Sidetone is controlled by the antisidetone circuit-in a telephone. This circuit controls the sidetone by
a. isolating the transmitter circuit during transmission.
b. opening the circuit to the receiver during transmission.
c. using separate transformers for the primary and secondary circuits.
d. balancing the components that are connected in parallel with the receiver.
CHECK YOUR ANSWERS WITH LESSON SOLUTION SHEET # 2, PAGE 29.