99--TECHNOLOGY TRANSFER OPPORTUNITY - DECONVOLUTION APPROACH FOR THE MAPPING OFACOUSTIC SOURCES

NASA Langley Research Center in Hampton, VA solicits interest from companiesinterested in obtaining license rights to commercialize, manufacture and market thefollowing technology. License rights may be issued on an exclusive or nonexclusive basisand may include specific fields of use. THE TECHNOLOGY: Developed by researchers at NASA Langley Research Center, DAMAS uses an iterativealgorithm to deconvolute noise signals, allowing for more accurate quantification of theposition and strength of acoustic sources. Recent development of the DAMAS microphonephased array processing methodology allows the determination and separation of coherentand incoherent noise source distributions. The DAMAS technology represents a significantbreakthrough in the field of aero-acoustics.In 2004, NASA developed a deconvolution approach for the mapping of acoustic sources(DAMAS) that decoupled the array design and processing influence from the noise beingmeasured, using a simple and robust algorithm. DAMAS does not add any additionalassumption to traditional array processing/integration analysis. It merely extracts thearray characteristics from the source definition presentation. In 2005, three-dimensionalapplications of DAMAS were examined. DAMAS was shown to render an unambiguousquantitative determination of acoustic source position and strength.The present development, called DAMAS-C, extends the basic approach to include coherencedefinition between noise sources. The solutions incorporate cross-beamforming arraymeasurements over the survey region. While the resulting inverse problem can be large andthe iteration solution computationally demanding, DAMAS-C solves problems no othertechnique can approach. DAMAS-C is validated using noise source simulations and isapplied to airframe flap noise test results.To express interest in this opportunity, please respond to Sean Sullivan at: NASA LangleyResearch Center, 17 West Taylor St., Mail Stop 218, Building 1212, Room 110 Hampton,Virginia, E-mail: contact@example.gov, or phone: +1 (555) 000-0000. Please indicate thedate and title of the FBO notice and include your company and contact information.Contracting Office Address: NASA Langley Research Center17 West Taylor Street, Mail Stop 218Building 1212, Room 110Hampton, VA 23689-2199Primary Point of Contact: Sean SullivanNASA Langley Research contact@example.gov: +1 (555) 000-0000