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US 6,554,101 B2Granted
Structure and method of absorbing and shielding sound
AssigneeNissan Motor Co., Ltd.
InventorsKyoichi Watanabe, Hiroaki Miura, Takayuki Fukui, Jun Okada
Life of this patent
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Abstract
A structure and method for absorbing and shielding sound from a source of sound are disclosed having at least four layers including a first panel layer 2, a sound absorbing material layer 3, a first air layer 4 and a second panel layer 6, which are located in a sequence from a source of sound. The sound absorbing material layer 3 has a ventilating property.
Claims32
A sound absorbing and shielding structure comprising;
- a first panel layer;
- a sound absorbing material layer having a ventilating property;
- a second panel layer;
- and
- a first air layer formed between the sound absorbing material layer and the second panel layer, and
- wherein the first panel layer, the sound absorbing layer, the first air layer and the second panel layer are located in a sequence from a source of sound and form at least four layers;
- and
- wherein the second panel layer has a first region formed with through-bores, and a second region having a non-ventilating property, wherein the second panel layer has a surface density ranging from 0.5 to 10 kg/m2, wherein an opening rate of the through-bores relative to a surface area of the second panel layer ranges from 1 to 50%, wherein a surface ratio between the second panel layer and the sound absorbing material layer ranges from 1:5 to 5:1, wherein the first air layer has a maximum thickness of a value 10% of a maximum thickness of the sound absorbing and shielding structure, and wherein the first air layer has a content product whose volume ratio ranges from 10 to 90% relative to a volume of the first air layer.
5 more elements
A sound absorbing and shielding structure comprising:
- a first panel layer;
- a sound absorbing material layer having a ventilating property;
- a second panel layer;
- a first air layer formed between a sound absorbing material layer and the second panel layer;
- a third panel layer located between the source of sound and the first panel layer;
- and
- a second air layer formed between the source of sound and the third panel layer, and
- wherein the second air layer, the third panel layer, the first panel layer, the sound absorbing layer, the first air layer, and the second panel layer are located in a sequence from the source of sound and form at least six layers;
- wherein the first and third panel layers have first regions formed with respective through-bores and second regions each having a non-ventilating property;
- wherein the second air layer has a thickness ranging from 10 to 60% of a maximum thickness of the sound absorbing and shielding structure;
- wherein the second air layer has a content product having a volume ratio ranging from 10 to 90% relative to a volume of the second air layer;
- wherein the sound absorbing material layer has a ventilating property at a side of the first air layer;
- wherein the second panel layer is made of plastic having a first region formed with through-bores, whose opening rate ranges from 1 to 50% relative to a whole surface of the second panel layer, and a second region having a non-ventilating property at an area except for the through-bores and having the surface density ranging from 0.5 to 10 kg/m2;
- wherein a surface ratio between the second panel layer and the sound absorbing material layer ranges from 1:5 to 5:1;
- and
- wherein the first air layer has a content product having a volume ratio ranging from 10 to 90% relative to a volume of the first air layer.
13 more elements
A sound absorbing and shielding structure comprising:
- a first panel layer;
- a sound absorbing material layer having a ventilating property;
- a second panel layer;
- and
- a first air layer formed between the sound absorbing material layer and the second panel layer;
- wherein the first panel layer, the sound absorbing layer, the first air layer and the second panel layer are located in a sequence from a source of sound and form at least four layers;
- and
- wherein the sound absorbing material includes a multi-layered structure composed of at least a high density layer and a low density layer.
5 more elements
A sound absorbing and shielding structure comprising:
- a first panel layer;
- a sound absorbing material layer having a ventilating property;
- a second panel layer;
- and
- a first air layer formed between the sound absorbing material layer and the second panel layer;
- wherein the first panel layer, the sound absorbing layer, the first air layer and the second panel layer are located in a sequence from a source of sound and form at least four layers;
- and
- wherein the high density layer of the sound absorbing material layer is made of a fibrous layer.
5 more elements
A sound absorbing and shielding structure comprising:
- a first panel layer;
- a sound absorbing material layer having a ventilating property;
- a second panel layer;
- a first air layer formed between the sound absorbing material layer and the second panel layer;
- and
- at least one content product having a volume ratio ranging from 10 to 90% relative to a total volume of the sound absorbing material layer and the first air layer,
- wherein the first panel layer, the sound absorbing layer, the first air layer and the second panel layer are located in a sequence from a source of sound and form at least four layers;
- and
- wherein the sound absorbing material layer has a preset surface area ranging from 5 to 90% relative to a surface area of the second panel layer, wherein the first air layer has a preset total thickness ranging from 3 to 70% relative to a maximum thickness of the sound absorbing and shielding structure, and wherein the first panel layer has a first region formed with through-bores with an opening rate ranging from 1 to 50% relative to a whole surface area of the first panel layer and a second region, except for the first region, formed with a ventilating area with a rate ranging from 30 to 100% relative to a whole surface area of the first panel layer except for the through-bores, the first panel layer having a surface density ranging from 0.5 to 10 kg/m2.
6 more elements
Dependencies are inferred from the claim text.