反射声对室内声景主观评价的影响初探

Preliminary research on the influence of floor reflected sound on subjective evaluation of indoor soundscape

梳理了近年来地面反射声和室内声景观的研究情况,结合实验心理学以及室内声景观主观评价等研究框架,通过三个基于反射声感知的声学可听化实验,确定了在四间房间内人耳对有无地面反射声参与的三种声音信号的绝对感觉阈。结果表明语音信号高于本底噪声10 dB(A)即可被察觉,而水流声及音乐声高于本底噪声17 dB(A)才能够被明显察觉,最后结合实验结果对地面反射声的处理给出了建议。

The research situation of indoor soundscape and floor reflected sound in recent years are introduced in this paper.By combining experimental psychological study and subjective evaluation of indoor soundscape,the absolute thresholds for sensation of human to three kinds of sound signals with or without floor reflection in four rooms are determined through three auralization experiments based on reflected sound perception.The results show that the human voice signal can be detected when it is 10 dB(A)higher than the background noise,while the stream sound and music sound can be significantly detected only when it is 17 dB(A)higher than the background noise.Finally,suggestions for processing floor reflection are given according to the experimental results.