Speaker
Description
Curved line arrays are typically optimized through geometric curvature and, when needed, delay loading to realize a prescribed direct-sound level decay over distance. While this effectively controls broadband level distribution, spectral inconsistencies remain due to discretization, element-to-element variability, and mutual coupling. This work proposes an element-wise equalization method that is directly linked to the curvature design via stationary-phase observation points. For each enclosure, distance‑ and frequency‑dependent responses are measured at its associated observation point, third‑octave‑averaged, and converted to a minimum‑phase representation using real‑cepstrum processing with cepstral windowing. Band‑limited spectral inversion then yields a per‑enclosure equalizer, with RMS normalization preserving the intended decay profile. Concert-hall measurements on a six-element RCF HDL26-A array demonstrate reduced spectral spread compared with a single common equalizer, particularly above 1 kHz. The approach improves frequency consistency while maintaining the desired A-weighted direct-sound attenuation, providing a practical complement to geometry-driven array design.