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US 2014/0233781 A1Published application
Sound transmission material, sound control plane structure including building use using the sound transmission material, windscreen for microphone, protective grille, sound transmission projection screen, and speaker
AssigneeTomoegawa Co., Ltd.
InventorsFukushi Kawakami, Takayuki Sano
Life of this patent
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Abstract
A sound transmission, material is made of fibers entangled with each other and has a self-standing property and a high performance sound transmission property, namely the Taber stiffness is not less than 5 mN·m, the bending resistance is not less than 100 mN, the porosity is not less than 50%, and the thickness is not more than 3 mm.
Claims14
A sound transmission material comprising fibers entangled with each other, the sound transmission material having Taber stillness not less than 5 mN·m, a bending resistance not less than 100 mN, porosity not less than 50%, and a thickness not more than 3 mm.
Dependencies are inferred from the claim text.