ABSTRACT
Objective To investigate the solutions to the comfort problem caused by traditional batch produc‐tion that cannot satisfy everyone's request .Methods The both objective and subjective evaluations were put forward to the assessment of ear comfort .The accurate data about the pinna was acquired through reverse engineering and extracting key points of the pinna by image detection method .The headphone model was built by the semi-parame‐ter design .Through the FESA study ,headphones - pinna contact pressure was assessed and relevant parameters were improved .Comfort was analyzed by contact pressure .Results The simulation contact pressure was compared before and after optimizing parameters .The results showed that the contact area of the augment cymba conchae could obtain more uniformity pressure .Conclusion The example verification shows this delivers better comfort than traditional one .The research has some reference value for the design and option comfortable headphones .
ABSTRACT
Objective: To explore task induced deactivation(TID) brain regions in WM task and its significance.Methods: 35 normal subjects receiving fMRI with a parametric digit n-back task(n=1,n=2,n=3 task) were employed,with an 0-back control condition.On the basis of behavioral performance of 3 back task in experiment,normal subjects whose accuracy exceeding or equal to 85% were included in high performing normal subjects(HPNS) group.Preprocessing,statistical analysis and result display of functional data were performed by SPM2.Results: For HPNS,task induced deactivation brain regions included: medial prefrontal cortex(MPFC),cingulate,right inferior frontal gyrus(BA47),multiple regions in bilateral temporal lobe.Within the scope of 2back load level,deactivation of TID brain regions increased with increasing load,and most TID regions showed platform manifestation once the 2back level was exceeded.Conclusion: TID network is essential for accurate performance of WM.