JBL VLA901Hi VLA White Paper - Page 10

Retractable-Roof Stadium 8-Array JBL VLA SERIES solution

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Indoor/Retractable Roof Football Stadium In an indoor stadium, the problems found in an arena are aggravated. Because the distances involved are greater (up to 230 feet), the time arrival differences are greater while the relative levels remain the same. Arrivals coming in from adjacent arrays are more likely to be perceived as echoes and further degrade speech intelligibility. Reverberation times are typically longer as well. Figure 7: Retractable-Roof Stadium 8-Array JBL VLA SERIES solution This model plots the result of eight JBL VLA SERIES arrays (standard power) in a large retractable roof stadium...three along each side and one for each end. Levels of 108dB (continuous) are achievable with this design. (Note that upper delays are not on). The system as installed is shown below: 9

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Indoor/Retractable Roof Football Stadium
In an indoor stadium, the problems found in an arena are aggravated. Because the distances
involved are greater (up to 230 feet), the time arrival differences are greater while the relative
levels remain the same. Arrivals coming in from adjacent arrays are more likely to be
perceived as echoes and further degrade speech intelligibility. Reverberation times are
typically longer as well.
Figure 7: Retractable-Roof Stadium 8-Array JBL VLA SERIES solution
This model plots the result of eight JBL VLA SERIES arrays (standard power) in a large
retractable roof stadium…three along each side and one for each end. Levels of 108dB
(continuous) are achievable with this design. (Note that upper delays are not on). The system
as installed is shown below: