Article
Simulating the Direct-Sound Coverage from the Directivity Measurement of a Fully Assembled Mini Line Array (en)
* Presenting author
Abstract:
State-of-the-art simulation of loudspeaker line arrays considers the measured directivity of one array element, and it evaluates the sound field of the elements combined using the measured, rotated directivity, a 1/r attenuation, and a r/c delay. The GLL white paper proposes to take the diffraction of neighboring loudspeakers into account by adding an array element above and below, in the measurement. In this contribution, we describe directivity measurement of a fully assembled mini line array whose elements are individually driven in the measurement. We propose removing the 1/r attenuation and the r/c delay of every element from the measurement to improve directional interpolation. Moreover, directional interpolation needs to consider the parallax to a distant point of observation. Before summing over the array elements, the 1/r attenuation and r/c delay for every element to this point of observation is re-inserted. We evaluate the proposed procedure for two array designs and compare the results to practical measurements along the audience area.