（5）ACS（Acoustic Control System）系统
ACS即声控制系统是由荷兰ACS公司与荷兰Delft大学于20世纪80年代合作开发的电声声场控制系统，ACS在世界各地的剧院、多功能剧场、大学礼堂、议会大厅和教堂等场所应用的工程实例已有50余处。欧洲应用较多主要有：荷兰、比利时、德国，其次是美国、加拿大和中国香港等国家和地区。
The article makes an introduction to the acoustic system of the Opera House from the following aspects: function orientation, equipment and distribution, modern active loudspeaker and amplifying system, amplifying sound field design, sound quality control and system test-running, natural sound and electronic sound, scientific and reasonable application of amplifying system and the acoustic effects of the Opera House.
