不要误导线阵列扬声器系统的应用(国外英语资料).docVIP

不要误导线阵列扬声器系统的应用(国外英语资料) Do not miss the use of wire array speaker systems Ministry of information industry, Institute of electroacoustic television, Professor, senior engineer Wang Fujin Abstract this paper takes over a period of time, some misleading phenomena in the application of line array loudspeaker system, this should be some basic questions of how to correctly understand and grasp the work are briefly discussed. Key words line array, line source, cylindrical wavefront, sound control, acoustic interference, comb filter. Since 1990s, a new member of the loudspeaker family has added a new line speaker system. In use, if properly configured, the line array speaker system can provide a smooth level coverage over the broadband range, as well as a controllable and strong vertical pointing feature. At the same time, it can provide high SPL, suitable for a large distance for sound. In particular, the line array loudspeaker system is easy to install and hang in the field, and these obvious outstanding performances are well received by users in modern large-scale mobile performances. However, we should also see that there have been some misleading phenomena in the application of wire array loudspeaker systems in recent years. The main performance is: 1. some speaker manufacturers in their products when the characteristic promotion is not rigorous, make people feel too commercial; 2. the stadium, some performances square line array loudspeaker system in publications on the experience, some of the facts is not accurate enough, such as transmission line array loudspeaker system and conventional system is different, the free travel distance for each doubling of the sound attenuation of 3dB. In the far field, the sound pressure level of sound amplification is more than 20dB higher than that of the conventional loudspeaker system at 200 meters. 3. some engineering company in some theatre projects, give the owner intends for the promotion of sound reinforcement system scheme