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Couplers for AiRAY, ViRAY and APS solve a common problem for Line Arrays.
Coverage: Once the mid and high frequencies behave correctly it is necessary to tackle the inconsistent horizontal coverage of line arrays. A typical narrowing of coverage between 150 and 1000 Hz (Fig. 5) is the main reason users count on a “90 degree” line array for much less than its specifications, leading to extra outfills being specified.
All drivers in CODA line arrays are loaded to a Coupler. This design combines the energy produced and allows the element to perform as a single source without phase destruction, achieving a coherent and uniform wavefront (Fig. 4). The Coupler design also determines the frequency response in the horizontal axis (Fig. 6).
Fig. 4. CODA Coupler behaves as a single waveguide, producing a unified wavefront without diffraction
Fig. 5. Frequency response of a typical 90º line array system comprising of 12 enclosures. Upper trace is measured on axis; lower trace is measured 30º off axis
Fig. 6. Frequency response of a CODA line array system comprisingof 12 enclosures with ViCOUPLER. Upper trace is measured on axis; lower trace is measured 30º off axis