We conduered various experimental research dealing with physical characteristics and sensation in order to be able to quantitatively express appropriate hardness in terms ofcornfo 砌 bility in residen 酬 noors . From among these , we indica 重ed in this paper the results of studies and the produotion ofaprototype impact source involv 血 g the impact fbrce ofthe heel , which [ s a representative impact force generated by f[ 〕otsteps. Then using the impact source to measure the amount ofdynamic Clisplacement in wooden fioors ofold construction and inthedirect − pasted wood flooring common 】 y used in recent multl − fami 】 y housing , we quantitatively determined the dynamio spring coe 丗 cient oftraditional wood − construction 且oor struoture , whioh had never befbre been clarified , and found that , among the displacement characteristics of 且oor construction, there are those that depend on be皿ding defbrmation , those that depend on local compression defbrmation , those that have both , suggesting 亡 hat those displacement characteristics may have a strong effect on the intensity of f( }otstep sensat め n . Key ・v ・ rds ・housingfl ・ ・r , vib 厂ati ・ n ・ eharaCteris
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