Term
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Definition
| The point in which feedback occurs |
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Term
| Name 3 things that factor into the potential for feedback |
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Definition
Speaker Response Acoustic Enviornment
Mic Response |
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Term
| Equivalent Acoustic Distance refers to |
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Definition
| The distance from source where source is understood |
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Term
| What is potential acoustic gain |
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Definition
| The amount of acoustic gain a system can achieve before maximum acoustic gain feedback |
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Term
| When is a sound system considered to be sufficent in providing adequate spl without feeding back |
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Definition
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Term
| How does changing the distance between the scource and the mic affect acoustic gain |
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Definition
1/2D = + 6db spl
2D = - 6 db spl |
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Term
| Hos does the number opf open mics on stage affect acoustic gain |
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Definition
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Term
| In what 4 ways is emi transmitted or introduced into an audio system |
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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 |
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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 |
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Definition
| Through Common Mode Rejection |
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Term
| What is the most commonsystem used for technical grounding |
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Definition
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Term
| Why is it dangerous to use an ac ground lift adapter |
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Definition
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Term
| What is the pin one problem |
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Definition
| XlR input and output pin one tied to circuit ground |
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Term
| What is the solution to the pin 1 problem |
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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 |
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Definition
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Term
| What are the 3 primary factors determining power loss in speaker cable runs |
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Definition
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Term
| How does reactance affect a speaker cable |
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Definition
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Term
| What does the 5% rule state |
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Definition
| cable resistance should never exceed 5% of load Resistance |
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Term
|
Definition
Numerical indication of how well and amp can control a loundspeaker
Amp output impedance Loudspeaker rated impedance |
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Term
| Name and exxplain 4 types of transucers used in loudspeaker enclosures |
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Definition
Electro dynamic (plasma)
Electrostatic ( 1khz and up)
Piezoelectric (rotary woofer
Servodrive (14 hz to 125 hz)
or EXOTIC |
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Term
| What does the parameter FS signify |
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Definition
| Resonant frequency of the driver determined by finding the peak impedance Dependent on the size and mass |
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Term
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Definition
| Amt of air in cubic feet having the same compliance as the drivers suspension |
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Term
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Definition
| Total resonance magnification at fs determines amt of dmaping due to both mechanical and electical charecteristics of the driver |
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Term
| Name and descrive five basic enclosure types |
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Definition
Dipole
sealed
vented and
combination |
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Term
| What does the parameter X max signify |
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Definition
Maximum excursion in millimeter (damage)
Vb=Box volume
Fsc = Resonant Frequency of the system (sealed Sytem)
Golden Ratio =(1:.618: 1.618)
dimensions |
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Term
|
Definition
| A point in space represented by x y and z coordinates |
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Term
|
Definition
| A collection of vertices that make up a plane that has acoustic properties |
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Term
| What information does a speaker model file contain |
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Definition
Sensitivity Data
Balloon Attenuation data |
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Term
| Why is it important to hit the F6 key everytime you make changes to your room model |
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Definition
| Saves to the parent program |
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