SOUND-TRANSMITTING MATERIAL, ACOUSTIC-CONTROL SURFACE STRUCTURE USING SAID MATERIAL AND HAVING APPLICATIONS INCLUDING CONSTRUCTION, MICROPHONE WIND SHIELD, PROTECTIVE GRILL, SOUND-TRANSMITTING MOVIE SCREEN, AND SPEAKER

摘要

[Problems] The present invention provides a sound transmission material which uses a material formed by entangling fibers and has a self-standing property and a high performance sound transmission property. [Means for solving] In the sound transmission material formed by entangling fibers with each other, 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.