SOUND ABSORBING MATERIAL FOR EARPHONE

摘要

PURPOSE: A sound-absorbing material is provided to prevent vibrations from an earphone housing by effectively absorbing the sound within a bass sound range. CONSTITUTION: A sound-absorbing material for an earphone comprises a noise absorbing wall(10) and a pattern layer(20). The noise absorbing wall is a member which is fixed to the inside of an earphone housing. The wall has a thickness of 0.3um-50um. The pattern layer is laminated in one side of the noise absorbing wall at the thickness of 0.3um-50um. A plurality of hybrid patterns are arranged by using a stamp in the exposed side of the pattern layer. A convex part has one among a prism, a cone, or a pyramid shape. The noise absorbing wall and the pattern layer is composed of at least one among polymer, a piezoelectric material, and a metal.