- Shuffle
Toggle OnToggle Off
- Alphabetize
Toggle OnToggle Off
- Front First
Toggle OnToggle Off
- Both Sides
Toggle OnToggle Off
Front
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
PLAY BUTTON
PLAY BUTTON
18 Cards in this Set
- Front
- Back
|
What is Potential Acoustic Gain
|
Amount of gain a system can achieve before feedback
|
|
When is a sound system considered to be sufficient in providing adequate SPL without feeding back
|
When PAB is less than or equal to NAB
|
|
How does Changing the distance between the source and the mic affect acoustic gain
|
Dbl Dist lose 6 dB
1/2 dist gain 6 dB |
|
How does the number of open mics on stage affect acoustic gain?
|
Dbl mics lose 3 dB
More mics less acoustic gain |
|
Descibe 5 ways we can improve gain before feedback
|
1. Use as few mics as possible
2. Mic as close to the source as possible 3. Mic and speaker Directionallity 4. Place speakers as close to listeners 5. Maxmize the dist from speaker to the mics |
|
What is Electromagnetic Interferance
|
Hum and Buzz
|
|
In what 4 ways is emi transmitted or introduced into a system
|
Magnetic and Electric field Coupling
Electromagnetic Radiation Common Impedence Coupling |
|
What are some ways we can reduce the levels of emi
|
Shield Isolate Twisting Balanced and seperate audio from power
|
|
Give me two examples of ISOLATION
|
Transformers
Fiber Optical |
|
Explain how a balanced differential input is able to reduce emi
|
Common Mode Resection
|
|
What is the most common system used for technical ground
|
Isolated Star Ground
|
|
What is the pin 1 problem
|
Pin 1 is tied to ground
|
|
What is the solution for the pin 1 problem
|
tie pin 1 to chasis ground
|
|
What is the maximum recommended length for a unbalanced cable run
|
10FT
|
|
What are 3 primary factors determining loss in speaker cable runs
|
Length, Load, and Gauge
|
|
What is Reactance
|
Freq Depend Resistance
|
|
How Does reactance affect a speaker cable
|
Freq Response
|
|
What does the 5 % rule state
|
Cable resistance should never extend over 5 %
|
