Term
| What advantage does the focal point of an array offer? |
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Definition
| It helps us determine accurate splay angles. The point at which a listener in the “far field” perceives the sound originating. |
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Term
| What are the two primary factors that affect array performance? |
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Definition
•Coverage angle of an individual speaker.
•Splay angle between adjacent speakers. |
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Term
| What are four basic types of point source arrays? |
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Definition
•Point Source Wide (splayed)
•Point Source Narrow (Tight)
•Point Destination (Split Xfire)
•Exploded (Split Point Source) |
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Term
| What type of array is recommended for front fill applications? |
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Definition
•Split Parallel
•Flown Center Cluster
•Onstage Fill |
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Term
| At what point should front fill speakers overlap? |
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Definition
| 6dB down point (2k) at the first row of listeners. |
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Term
| What are delay fills used? |
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Definition
•Outdoors: to overcome the natural attenuation of high frequencies by the air.
•Indoors: To increase the direct to reverberant sound ratio |
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Term
| What is a fictitious source? |
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Definition
| A point used for the time reference of a system. All speaker systems are delayed to this point. |
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Term
| Name some important considerations when using delay towers. |
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Definition
| To maintain the same axis as the mains. Many small zones are more effective than 1 big one. Don’t crank them up, make them transparent to the mains (unless a new visual reference is established). Pursue stereo at your own risk. |
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Term
| What is the difference in level between half space and quarter space? |
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Definition
| 10log4 - 10log2 = 6 - 3 = 3dB |
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Term
| What is so important about a horn’s cut off frequency? |
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Definition
| The lowest frequency a horn can safely produce and maintain acoustic loading. |
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