In order to suppress the reflected acoustic waves of wide band noise in a narrow and enclosed space, this article intro-duces a reflected acoustic wave suppression method based on the cepstrum clip. In the proposed method, firstly, the reflected part in the cepstrum of noise is divided by the environmental impulse response duration; secondly, abnormal points in the reflected part are determined by the theory; finally, the abnormal points are assigned to normal values again, thereby the reflected components are suppressed without breaking the direct components of noise. To validate the proposed method, experiments were performed in an ordinary room, which is a weak reflection environment, and in an experimental module, which is a strong reflection environment. Experimental results show that the proposed method can effectively suppress the reflected acoustic waves. The error of sound field reconstruction brought by the reflected acoustic waves is decreased from 90% to 35% , indicating that the proposed method improves the accuracy of sound field reconstruction.%为了抑制狭小封闭空间内宽频噪声场的反射声波，提出一种基于倒谱裁剪的反射声波抑制方法。首先利用环境脉冲响应的持续时间对信号倒谱反射成分进行划分，然后根据理论对代表反射成分的异常点进行判定，最后对异常点的幅值重新赋予正常值，从而在不破坏噪声信号直射成分的前提下对反射声波进行抑制。在室内弱反射环境和小实验舱内强反射环境中进行对比实验验证，实验结果表明新方法可有效抑制反射声波，对于反射声波所带来的声场重构误差，由90%降低至35%，有效提高了声场的重构精度。
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