12面体扬声器系统的制作

Manufacture of Dodecahedron Loudspeakers System

12面体扬声器系统是建筑声学测量常用的一种声源,其制作难点之一是确定所采用扬声器单元的指向性,该问题可通过EASE软件仿真解决。首先通过EASE软件建立在水平方向和垂直方向的指向性相同的扬声器单元数据库,再由建立的扬声器单元组合成12面体扬声器系统,每个系统采用同一指向性的扬声器单元,并进行12面体扬声器系统的指向性仿真,对比仿真结果,选择较优指向性的扬声器单元,制作12面体扬声器系统,最后给出制作实物的指向性测量结果,结果符合相关标准的要求,表明该方法能快速准确地确定12面体扬声器系统所采用的扬声器单指向性指标。

The dodecahedron loudspeakers system is one of the popular sound sources used in the building acoustics measurements.One of the difficulties in its manufacture is to determine the directivity of the loudspeaker groups.This problem can be resolved by the EASE software simulation.First of all,the database of the loudspeaker groups with the same directivity in the horizontal plane or vertical plane is established by means of the EASE software.Secnndly,the dodecahedron loudspeakers system can be obtained by composing the established loudspeaker groups with the same directivity,and then the directivity of the dodecahedron loudspeakers system is simulated.The dodecahedron loudspeakers system is manufactured based on the simulation result.Finally,the directivity of the manufactured dodecahedron loudspeakers system has been measured,and the result is in accordance with the related standards.It indicates that this method is able to determine the directivity of the loudspeaker quickly and accurately.