吸音材

Sound absorption material

Abstract

【課題】薄くて軽量であり、幅広い周波数領域において優れた吸音性能を有する吸音材を提供する。 【解決手段】不織布を含む吸音材であって、該不織布が、連続繊維で構成され、目付300g/m 2 以下、厚み10mm以下であり、該吸音材のJIS A 1405の垂直入射法により測定された周波数3000Hzの吸音率が30%以上、周波数4000Hzの吸音率が60%以上、かつ周波数6000Hzの吸音率が80%以上であることを特徴とする吸音材とする。 【選択図】なし
PROBLEM TO BE SOLVED: To provide a thin and lightweight sound absorption material which has an excellent sound absorbing performance in a broad frequency region.SOLUTION: A sound absorption material includes a nonwoven fabric. The nonwoven fabric is constituted of a continuous fiber and has a weight of 300 g/mor less and thickness of 10 mm or less. The sound absorption material has acoustic absorptivity of 30% or more at a frequency of 3000 Hz, acoustic absorptivity of 60% or more at a frequency of 4000 Hz, and acoustic absorptivity of 80% or more at a frequency of 6000 Hz, measured by the vertical incidence method of JIS A 1405.

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Patent Citations (5)

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