The speaker is accommodated without giving the strange feeling for the human body, impact from outside to the speaker is evaded simultaneously, cushion function and the ideal sound effect and the sound pressure effect are obtained. Random of the continual filament of the thermoplastic resin filament mutual the loop or the cirque adjoins contact slip gathering, being three-dimensional structure body which has the air gap of the specified bulk density which becomes, the mediating/helping equipment doing the inner layer whose bulk density of the said three-dimensional structure body is low, in the longitudinal direction inside and outside, forming the surface layer whose bulk density is high, the spring structural resin itself which becomes, supports the human body in when using 10 and, The cushion 20 which has the speaker which is built in inside the aforementioned spring structural resin itself 10, or, on the inside and outside each aspect of the aforementioned spring structural resin itself 10 it is opposed is arranged.人体に対する違和感を与えることなくスピーカを収容し、同時にスピーカへの外部からの衝撃を回避して、クッション機能と好適な音響効果及び音圧効果を得る。熱可塑性樹脂の連続線条のランダムなループ又はカールの隣接する線条相互を接触絡合集合して成る所定の嵩密度の空隙を備える三次元構造体であって、該三次元構造体の嵩密度の低い内層を介装して、長手方向表裏に、嵩密度の高い表面層を形成してなり、使用時において人体を支持するスプリング構造樹脂本体10と、前記スプリング構造樹脂本体10内に内蔵され、又は、前記スプリング構造樹脂本体10の表裏いずれかの面に対向配置されたスピーカを備えるクッション20。
