To provide a device constituted so that a person planning the construction of a house can really experience the noise insulating performance of the house from various sides.

Plural typical noises which can not be heard because of being insulated by noise insulating walls out of living noises generated in normal living in a house are selected and recorded in respective recording media so as to be optionally listened through respective reproducing devices and these recording media and reproducing devices are arranged together with plural earphones 11 to 16. Outer walls, partition walls, floors, sashes, doors, site environments, the insides of rooms, the outsides of rooms, lower floors, and upper floors can be changed as elements to be changed, and after a change of a certain element to be changed, the degree of noise through the changed part can be simulated and an image corresponding to the changed element is projected.