1:10缩尺人工头研制及其在建筑声学缩尺模型测量中的应用

采用三维激光扫描技术对01dB MK2B人工头进行扫描,建立了包含耳道的人工头数字模型,再利用3D打印技术按照1:10的缩尺比打印出缩尺人工头,并将1/8 in传声器嵌入缩尺人工头内。在消声室内分别测量了足尺和缩尺人工头的双耳脉冲响应,并计算了双耳时间差ITD、双耳声压级差ILD以及双耳互相关系数IACC,对比分析结果显示两者吻合很好。将研制的人工头应用于天津文化中心音乐厅1:10声学缩尺模型IACC参数测量,模型测量结果与现场测量结果一致。该方法制作的缩尺人工头可用于声学缩尺模型实验中厅堂空间感参数的测量并有望应用于可听化技术。

1:10 scale dummy head and its application in architectural acoustics scale model measurement

3D scan and 3D print technology are applied to design a 1:10 scaled dummy head. Ear canals model are constructed in computer according to the size of 1/8 inch microphone. Two 1/8 inch microphones are placed inside the scale dummy head after 3D printing. The binaural impulse responses were measured in anechoic chamber, and the values of Inter-aural Cross Correlation Coefficient (IACC), Inter-aural Time Difference (ITD) and Inter-aural Level Difference (ILD) are analyzed and compared between scaled dummy head and real dummy head. The scaled dummy head was then applied in the 1:10 acoustic scale model of the concert hall in Tianjin Cultural Center. The measured IACC values in acoustics scale model are consistent with the field measured results. It can be expected that the scale dummy head could be used to predict spaciousness parameters and is hopeful to realize auralization in architectural acoustics scale model test.