作为可移动式的便捷系统，设计时将标准环境的消音室，缩小简化为一个小型的声级测试箱。
As a portable and convenient system , standard anechoic chamber is designed and reduced to a small sound level testing case .
消音室自由声场及其鉴定方法
The Free Sound Field of Anechoic Room and its Appraisal Method
消音室