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.