中文摘要：

声频定向扬声器是利用参量阵原理，产生高指向性声频信号的新一代扬声器。就其基本原理、系统特点、研究历史、研究进展与热点、应用领域作了全面阐述。指出该类扬声器是一技术含量高、市场应用前景极为广阔的新型扬声器。目前其在国际上还处于商业化的初级阶段，国内外市场基本还处于未开发状态，因而具有极大的市场发展潜力。

英文摘要：

Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle. A comprehensive description on its basic principle, system characteristics, researching history, researching progress ＆ hotspot and application field is presented. Furthermore, it is put forward that this kind of loudspeaker is a novel loudspeaker with the high technical requirements and has an extremely extensive application prospect in the market. Currently, this kind of loudspeaker is at its primary commercialization stage, and by and large, its domestic and intematioual markets are still not exploited, which means that it has extremely huge market potential.