Audio & Wiring

Question 1

How do you find the total impedance for speakers in series

Answer 1

Add individual impedance of each speaker

Question 2

How do you find the total impedance for speakers in parallel

Answer 2

divide by total number of speakers

Question 3

Define Potential acoustic gain

Answer 3

the potential gain that can be delivered by the sound system without ringing & before feedback occurs. It is based on the number of open mic’s & distance between sources

Question 4

Define needed acoustic gain

Answer 4

Gain needed to to achieve equivalent acoustic level for the farthest listener that is equal to what the nearest listener would hear without sound reinforcement

Question 5

What is the typical sound level for speech reinforcement

Answer 5

65-70 dB

Question 6

What is the typical target signal to noise ration

Answer 6

25 dB above noise level

Question 7

Which microphone type requires power

Answer 7

Condenser

Question 8

What is the equation for Ohm’s law

Answer 8

Amps * Resistance = Volts

Question 9

What is the permissable area of 1 cable

Answer 9

53%

Question 10

What is the permissable area of 2 cables

Answer 10

31%

Question 11

What is the permissable area of 3 cables

Answer 11

40%