Far field acoustic radiation reduction
First Claim
1. A system for reducing a structure'"'"'s far field acoustic radiation signature, comprising:
- means for measuring near field acoustic radiation of the structure;
means for generating a prediction of the structure'"'"'s far field acoustic radiation signature using said near field acoustic radiation;
means for generating at least one noise control signal to using said prediction; and
acoustic radiator means mounted within said structure for converting substantially all of said at least one noise control signal to airborne acoustic energy within the structure, wherein said airborne acoustic energy reduces the structure'"'"'s far field acoustic radiation signature.
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Accused Products
Abstract
A system and method are provided to reduce a structure'"'"'s far field acousticadiation signature. A plurality of acoustic sensors are positioned in the acoustic near field of the structure for measuring the near field acoustic radiation of the structure. A programmable controller generates a prediction of the structure'"'"'s far field acoustic radiation signature using the near field acoustic radiation. The prediction is then used to generate a noise control signal applied to a plurality of acoustic radiators suspended within the structure. The radiators convert substantially all of the noise control signal to airborne acoustic energy within the structure.
8 Citations
12 Claims
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1. A system for reducing a structure'"'"'s far field acoustic radiation signature, comprising:
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means for measuring near field acoustic radiation of the structure; means for generating a prediction of the structure'"'"'s far field acoustic radiation signature using said near field acoustic radiation; means for generating at least one noise control signal to using said prediction; and acoustic radiator means mounted within said structure for converting substantially all of said at least one noise control signal to airborne acoustic energy within the structure, wherein said airborne acoustic energy reduces the structure'"'"'s far field acoustic radiation signature. - View Dependent Claims (2, 3, 4)
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5. A system for reducing a structure'"'"'s far field acoustic radiation signature, comprising:
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a plurality of acoustic sensors positioned in the acoustic near field of the structure for measuring the near field acoustic radiation of the structure; a programmable microprocessor connected to said plurality of sensors for generating a prediction of the structure'"'"'s far field acoustic radiation signature using said near field acoustic radiation, and for generating at least one noise control signal using said prediction; and a plurality of acoustic radiators suspended within the structure and connected to said programmable microprocessor for converting substantially all of said at least one noise control signal to airborne acoustic energy within the structure, wherein said airborne acoustic energy reduces the structure'"'"'s far field acoustic radiation signature. - View Dependent Claims (6, 7, 8, 9)
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10. A method for reducing a structure'"'"'s far field acoustic radiation signature, comprising the steps of:
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measuring near field acoustic radiation of the structure with a plurality of acoustic sensors; generating, with a programmable controller, a prediction of the structure'"'"'s far field acoustic radiation signature using said near field acoustic radiation of the structure, and at least one noise control signal using said prediction; and converting, with a plurality of acoustic radiators, substantially all of said at least one noise control signal to airborne acoustic energy within the structure, wherein said airborne acoustic energy reduces the structure'"'"'s far field acoustic radiation signature. - View Dependent Claims (11, 12)
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Specification