Uniform Sound Pressure Level Distribution with Frequency Ranging from 600Hz to 1000Hz

In front of the conventional loudspeaker array, the sound pressure level of uniform distribution in a linear listening area is constrained by frequency range. In the previous papers, we have realized SPL distribution evenly from 200 to 500 Hz by controlling the phase of linear loudspeakers. However, with the increasing of frequency, we have to consider about the directivity of single loudspeaker. In this paper, we present a new method to achieve uniform sound pressure level distribution from 600 to 1000Hz by designing the angle of placement and the phase of loudspeaker array which is composed of directional speakers. The simulation results show that the SPLs on the test listening line are basically uniform from 600 to 1000Hz, which demonstrate that the improvement is effective.