吸声降噪与其它降噪方法有一不同之处,即其不仅有声级的变化,而且有混响时间的变化.这样,吸声降噪的主观感觉有可能和一般的声级变化与主观感觉的关系有所差异.这一点在一些实际工程中已有所体现.本文拟通过主观评价实验来定量地考察几个有关吸声降噪主观感觉的问题,具体包括: Sound absorption and noise reduction and other noise reduction methods are different, that is, not only the sound level changes, but also the reverberation time changes, so that the subjective feeling of sound absorption and noise reduction may be the general sound level changes and subjective feelings Which has been reflected in some practical projects.This paper intends to quantitatively examine several subjective perceptions of sound absorption and noise reduction through subjective evaluation experiments including: