A uniform SPL distribution method of linear phased loudspeaker array using genetic algorithm

Abstract

Directivity of traditional linear loudspeaker arrays leads to a nonuniform distribution of the sound pressure level (SPL) in a listening area. This paper presents a novel scheme using linear phased loudspeaker array to uniform the distribution and let more listeners have the same perception. By designing a specific directivity pattern and obtaining the phase weighs of the excitation using the genetic algorithm so as to accurately control the pattern details, uniform distribution of SPL in a linear listening area is achieved. The experimental result shows that the SPLs on the listening test line range from 83dB to 83.7dB and are basically uniform, demonstrating that the scheme proposal is reasonable and effective.