Term
| Name some unique benefits ear monitor systems provide |
|
Definition
low stage volume
mobility
Clean stage
Less setup time
safer on your ears |
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|
Term
| How does an ambient mic fed into a musicians in ear monitor mix help the musician |
|
Definition
It helps the musicians hear crowd response and helps with localization when using isolation
and allows communication on stage |
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|
Term
| What is the signal flow for a Wireless IEM signal flow in order |
|
Definition
| Console> IEM processor >IEM Transmitter >IEM reciever> Ear Buds |
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|
Term
| What does the term loop unity gain refer to |
|
Definition
| The point in a system in wich feedback occurs |
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|
Term
|
Definition
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|
Term
| Describe 5 ways we can improve gain before feed back |
|
Definition
Use as few mics as practical
Mic as close to the scource as practical
Take advantage of speaker and mic directionality
Place the speakers as close to the listener as practical
Maximize distance between mics and speakers
PAG>Nag
- |
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Term
| In what 4 ways is emi transmitted or introduced into an audio system |
|
Definition
common impedence coupling
electric field coupling
Magnetic field Coupling (humm)
Electromagnetic Radiation RFI |
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Term
| What are some ways we can reduce levels of EMI |
|
Definition
Shields
Seperation
Twisting /figure 8/Cross at 90
Fix pin 1 problem
Balanced interconnection |
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Term
| Explain how a balanced differential input is able to reduce EMI |
|
Definition
| Through Common Mode Rejection |
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Term
| What is the most commonsystem used for technical grounding |
|
Definition
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|
Term
| What is the solution to the pin one problem |
|
Definition
| Tie the XLR input and output pin 1 directly to chassis ground |
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Term
| What is the maximum recomended length of an unbalanced cable run |
|
Definition
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|
Term
| What are the 3 primary factors determining power loss in speaker cable runs |
|
Definition
|
|
Term
| What does the 5% rule state |
|
Definition
| cable resistance should never exceed 5% of load Resistance |
|
|
Term
|
Definition
dc voice coil resistance
DF=___________________________
Amplifier output z+ Cable Resistance |
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|
Term
| What is the difference between multimode and single mode |
|
Definition
One pathway for single and 2 paths for Multi
short lower bandwith
Longer higher bandwith |
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|
Term
| Name 4 advantages of using fiber optics over copper cables |
|
Definition
Higher bandwith
Low attenuation
Immune to EMI
Light weight
and also high security |
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|
Term
| Name two methods used to splice fiber optic cables |
|
Definition
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|
Term
| What does the parameter Fs Signify |
|
Definition
| Resonant frequency of the driver determined by finding the peak impedance Dependent on the size and mass |
|
|
Term
|
Definition
| Amt of air in cubic feet having the same compliance as the drivers suspension |
|
|
Term
| Name and descrive five basic enclosure types |
|
Definition
Dipole
sealed
vented
combination
and horn |
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|
Term
| Why are volume displacement values important |
|
Definition
Displacement affects enclosure volume
and volume affects systems resonant frequency |
|
|
Term
| What does the parameter X max signify |
|
Definition
Maximum excursion in millimeter (damage)
Vb=Box volume
Fsc = Resonant Frequency of the system (sealed Sytem)
Golden Ratio =(1:.618: 1.618)
dimensions |
|
|
Term
|
Definition
| A collection of vertices that make up a plane that has acoustic properties |
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|
Term
| Why is a transformer required at each speaker in a distributed system |
|
Definition
Commercial power distribution
and Step down voltage |
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|
Term
| What three Voltages are commonly used for constant voltage audio systems |
|
Definition
100 volts
70.7 volts
and 25 volts |
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|
Term
| What is the industry rule of thumb used when figureing required amp output wattage for a constant voltage system |
|
Definition
Total tap wattage + 20% amp wattage or total tap wattage x 1.2 = amp wattage
number of speakers
zones and control
wire requireement
Amp Requirement |
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|
Term
| What are the two field components that make up a radio wave |
|
Definition
|
|
Term
| Name two types of modulation |
|
Definition
|
|
Term
| What two types of audio processing are used in transmitting and recieveing |
|
Definition
Pre and Post emphasis
and
COMPANDING |
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|
Term
| What does the term"TRUE DIVERSITY" mean |
|
Definition
| true diverstiy is the ability to sample the radio feild from 2 or more locations and select or combind the resulting signal |
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|
Term
| Name the two types of antenna Distribution |
|
Definition
|
|
Term
| Name and explain some methods used to test a driver |
|
Definition
9 VOLT BATTERY
dmm ohms continutiy
sine wave sweeper |
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|
Term
| Name 3 benifits of using ferrofluid |
|
Definition
Heat dicipation
Keep coil centered in the gap
Extra Mechanical damping |
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|
Term
| Name 3 types of material used to make compression driver diaphrams |
|
Definition
Alluminum
Titanium
Beryllium |
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|
Term
| Why are we forced to deal with a systems gain structure |
|
Definition
| because there is no standard peak level or noise floor |
|
|
Term
| How many volts does 0dbu equal |
|
Definition
|
|
Term
| What four methods are used to determine clip points in a system |
|
Definition
on board lights
oscilliscope
Piezo tweeder
DMM |
|
|
Term
| How many Volts is + DBU ? 10 Db/20 X Reference Volts= Volts |
|
Definition
| ????????????????????????????@! |
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|
Term
| Name the three common network topologies |
|
Definition
The Ring The star The bus
aka
Ringo Star Rides The Bus |
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|
Term
|
Definition
| Technology Cobranet is a combination of hardware network protocol and Firmware |
|
|
Term
| How many channels of digital audio can a system using cobranet carry on a 100 base t network |
|
Definition
| Cobranet can carry 6k4 channels of 20bit/48k audio over a switched 100 base t network |
|
|
Term
| What is the job of a conductor in a cobranet Systems |
|
Definition
| the conductor is the time keeper |
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|
Term
| At what point should front fill speakers overlap |
|
Definition
| 6db down at the front row of listeners or side step the speakers |
|
|
Term
| Name some important Considerations when using delay towers |
|
Definition
Many small ones better than one big
Dont crank them make them transparent
Maintain same axis as the mains
Persue stereo at your own risk |
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|
Term
| What is the difference between a directivity factor and a directivity index |
|
Definition
| Beam with expressed as Q and spl increase on axis compared to whole space |
|
|
Term
Remeber we also have to wire one series speaker diagram
and one parallel speaker diagram
and for the math remeber to take impedance and divide it by the number of speakers |
|
Definition
um ya
Email me at
Shenubs@hotmail.com if you found this shit use full
thanks alot folks good luck
two tone |
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