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
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United States of America Patent
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Dec 22, 2015
Grant Date -
Aug 21, 2014
app pub date -
Aug 30, 2012
filing date -
Sep 12, 2011
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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.
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