消声的 meaning in English

anechoic
antihum

In this paper , the problem is studied and a solution is put forward from the point of view of the transference function
从传递函数的角度分析了管道有源消声的次源声反馈问题，并提出了解决上述问题的方法。
As the research on the subject at home is not clear and systemic , it is important to solve the problem
但是目前国内对进气消声的研究还不系统，因此对进气噪声的产生机理及控制技术的研究已经成为一个亟待解决的问题。