Apparatus and method to attenuate vibration and acoustic noise
First Claim
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1. A vibration and sound attenuator comprising:
- a plurality of first layers formed from a non-metal material having a predetermined level of resistance to deformation to define a frequency response based on a vibrating frequency, the non-metal material having a profile defined by at least one sinusoid, wherein the plurality of first layers are configured in a stacked arrangement, and at least two of the plurality of first layers are tuned differently to define different frequency responses; and
a second layer defining an absorption layer coupled to at least one of the first layers, the second layer adding a body of mass adjacent the first layer.
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Abstract
An apparatus and method to attenuate vibration and acoustic noise are provided. One apparatus includes a first layer formed from a non-metal material having a predetermined level of resistance to deformation to define a frequency response based on a vibrating frequency. The non-metal material has a profile defined by at least one sinusoid. The apparatus also includes a second layer defining an absorption layer coupled to the first layer. The second layer adds a body of mass adjacent the first layer.
35 Citations
22 Claims
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1. A vibration and sound attenuator comprising:
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a plurality of first layers formed from a non-metal material having a predetermined level of resistance to deformation to define a frequency response based on a vibrating frequency, the non-metal material having a profile defined by at least one sinusoid, wherein the plurality of first layers are configured in a stacked arrangement, and at least two of the plurality of first layers are tuned differently to define different frequency responses; and a second layer defining an absorption layer coupled to at least one of the first layers, the second layer adding a body of mass adjacent the first layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21, 22)
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13. A vibration and sound attenuator comprising:
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a plurality of stiffness layers formed from a non-metal material having a surface following a sinusoidal path, wherein the plurality of stiffness layers are configured in a stacked arrangement and at least two of the plurality of stiffness layers are tuned differently to define different frequency responses; an absorption layer coupled to at least one of the plurality of stiffness layers, the absorption layer adding a body of mass adjacent the stiffness layer for absorbing vibrations; and a damping layer coupled to at least one of the stiffness layer or the absorption layer to further absorb the vibrations. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for attenuating vibration and sound, the method comprising:
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providing a plurality of stiffness layers formed from a non-metal material having a surface following a sinusoidal path, wherein the plurality of stiffness layers are configured in a stacked arrangement and at least two of the plurality of stiffness layers are tuned differently to define different frequency responses; providing an absorption layer and coupling the absorption layer to at least one of the plurality of stiffness layers, the absorption layer adding a body of mass adjacent the stiffness layer for absorbing vibrations; and providing a damping layer and coupling the damping layer to at least one of the plurality of stiffness layers or the absorption layer to further absorb the vibrations.
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Specification