This paper is dedicated to an experimental implementation of active anechoicity control illustrating previous theoretical work. The aim of this experimental is to cancel the pressure scattered by the single rigid wall of a semi-anechoic room, turning the latter into a fully anechoic one over a given frequency range. The proposed method is presented in two steps: estimation of the scattered pressure and its control. Two numerical simulations are presented in order to show the feasibility of the method. An experimental campaign is presented, where the active control system leads to a reduction of the field scattered by the rigid wall throughout a significant part of the measuring volume inside the room. Although these results are based on post-processing of measurements, and not real-time computation, they confirm the possibility to extend the frequency range of a small facility toward lower frequencies, by adding to its passive lining a set of ordinary sources and pressure microphones.

本文致力于主动消声控制的实验实现，说明了先前的理论工作。该实验的目的是消除由半消声室的单个刚性墙散射的压力，从而将其在给定的频率范围内转变为完全消声的室。所提出的方法分两个步骤提出：分散压力的估计及其控制。为了说明该方法的可行性，提出了两个数值模拟。提出了一个实验性活动，其中主动控制系统导致整个房间内大部分测量空间中刚性墙散射的场的减小。尽管这些结果基于测量的后处理，而不是实时计算，