Line array sound is a speaker system, its technology and manufacturing, for many years, has been in steady development. The situation has changed recently with the introduction of linear array loudspeaker systems at many of the world's major sports events and performances.
The world's major professional speaker, speaker companies have launched their own linear array speaker systems. Among them: Meyersound M3D, deliya-sound-la210, EV x-line, SVS L, Martin Audio W 8L, CODA LA series. These systems have different names but much the same principles and characteristics. At the same time their own maverick, or in the structure, or in the box body technology, unit selection and other aspects of the eight immortals across the sea, each brilliant. It not only avoids the trouble of patent, imitation and plagiarism, but also develops a school of its own and promotes the selling point of its own company. This naturally causes the domestic colleague's interest and the attention. Questions continue to be asked, but there is so little information in the national publications that it is necessary to discuss them.
A linear array is a group of closely spaced radiation units arranged in a straight line with the same amplitude and phase.
Figure 1(a) and (b) are schematic drawings of a linear array speaker system. Although it is arranged in a straight line, but the coverage of the arrangement of the Angle is different. The concept of linear arrays is not new today. It was first proposed by the renowned American acoustical expert H. F olson. In 1957 Mr Olson published a classic acoustic treatise, acoustic engineering, describing how linear arrays are particularly suited to distant acoustic radiation. This is because linear arrays can provide very good directivity of vertical coverage to achieve good acoustic effects.
The earliest linear array speaker systems appeared in the 1970s, but were not yet complete. It comes in the form of a "sound wall." Dozens or even hundreds of speakers are stacked horizontally and vertically to form sound walls. When the power of tens of thousands of watts is turned on, the earth shakes and the momentum is extraordinary. But people soon found its shortcomings, not only need too many speakers, but also the mutual interference between speakers, making the sound quality worse, directivity, coverage are affected. In 1983, in the European AES conference, Philips introduced a Bessel functional matrix concept and adopted a simple weighting factor to solve this problem. But Bessel arrays must be licensed from Philips, and there is a price to pay. What's interesting is that companies with linear array loudspeaker systems are being coy about Bessel. The linear array loudspeaker system used today has been greatly improved, which is not the same as in the early days. It's also structurally quite useful. For example, dozens of boxes, in one hour, can be completed assembly, hanging, wiring, immediately put into use.