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dc.contributorVirginia Tech. Department of Mechanical Engineering. Vibration and Acoustics Laboratoriesen_US
dc.contributor.authorGentry, C. A.en_US
dc.contributor.authorGuigou, Catherineen_US
dc.contributor.authorFuller, Chris R.en_US
dc.identifier.citationGentry, C. A., Guigou, C., & Fuller, C. R. (1997). Smart foam for applications in passive-act radiation control. Journal of the Acoustical Society of America, 101(4), 1771-1778. doi: 10.1121/1.418234en_US
dc.description.abstractThe development of a smart foam for passive-active noise control is discussed. The smart foam consists of cylindrically curved sections of PVDF film embedded in partially reticulated polyurethane acoustic foam forming a very thin, compact arrangement. The device is designed to reduce sound by the simultaneous action of the passive absorption of the foam (effective at high frequencies) and the active input of the PVDF element driven by an oscillating electrical input (effective at low frequencies). The PVDF actuator is configured to behave in a linear sense and to couple in-plane strain associated with piezoelectric effect with out-of-plane motion needed to radiate sound from the foam surface. The performance of the passive-active device is studied for controlling sound radiation from a vibrating piston. A feedforward LMS controller is used to minimize the signal from a far-field error microphone, Results of harmonic and broadband control are presented. The potential of the smart foam for globally reducing sound radiation in the low- and high-frequency range is demonstrated. (C) 1997 Acoustical Society of America.en_US
dc.description.sponsorshipUnited States. Office of Naval Research - Grant No. ONR N00014-94-1-1140en_US
dc.description.sponsorshipUnited States. Army Research Office - Grant No. DAA H04-95-1-0037en_US
dc.description.sponsorshipLangley Research Centeren_US
dc.format.extent8 pagesen_US
dc.publisherAcoustical Society of Americaen_US
dc.rightsIn Copyrighten
dc.subjectAcoustic noise controlen_US
dc.subjectRadiation monitoringen_US
dc.subjectAcoustic absorptionen_US
dc.titleSmart foam for applications in passive-active radiation controlen_US
dc.typeArticle - Refereeden_US
dc.contributor.departmentMechanical Engineeringen_US
dc.title.serialJournal of the Acoustical Society of Americaen_US

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