Sound absorbing mechanism using a porous material
First Claim
1. A sound absorbing mechanism using a porous material to be placed on a sound insulator comprising:
- a sound absorbing plate made of a thin plate of a porous material;
supporting members for supporting said sound absorbing plate above said sound insulator, the supporting members forming separated plural first back air spaces bydefining a space between said sound absorbing plate and said sound insulator; and
first hollow members placed on a back of said sound absorbing plate within each said first back air space for forming first resonators defining second back air spaces separated and independent from said first back air spaceswherein an air gap is maintained between said first hollow members and said sound insulator such that said first hollow member is not in contact with said sound insulator and wherein each first back air space has a substantially U-shape, defined by said sound absorbing plate, said sound insulator, said supporting members, said first hollow members and said air gap.
1 Assignment
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Accused Products
Abstract
A sound absorbing mechanism using a porous material has a sound absorbing plate of a thin plate porous material made by partially heating for welding plastic particles and a supporting member for supporting the sound absorbing plate and forming a back air space. More than one pair of resonators having a separated back air space in the aforementioned back air space are fixed to the sound absorbing plate, and the resonators are disposed to be opposed to a sound insulator with the supporting member between. Plural reflecting members or increased sound absorbers may be disposed to be opposed to the surface of the sound absorbing plate opposite to the surface equipped with the resonators, or a perforated protecting plate fixing the plural reflecting members or the increased sound absorbers thereon are may be equipped. The sound absorbing mechanism has a superior sound absorption characteristic from lower frequencies to higher frequencies.
35 Citations
9 Claims
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1. A sound absorbing mechanism using a porous material to be placed on a sound insulator comprising:
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a sound absorbing plate made of a thin plate of a porous material; supporting members for supporting said sound absorbing plate above said sound insulator, the supporting members forming separated plural first back air spaces by defining a space between said sound absorbing plate and said sound insulator; and first hollow members placed on a back of said sound absorbing plate within each said first back air space for forming first resonators defining second back air spaces separated and independent from said first back air spaces wherein an air gap is maintained between said first hollow members and said sound insulator such that said first hollow member is not in contact with said sound insulator and wherein each first back air space has a substantially U-shape, defined by said sound absorbing plate, said sound insulator, said supporting members, said first hollow members and said air gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification