The design of a wideband and widebeam piston transducer in a finite closed circular baffle

buir.contributor.authorKöymen, Hayrettin
dc.contributor.authorŞahin, Z.en_US
dc.contributor.authorKöymen, Hayrettinen_US
dc.coverage.spatialParis, France
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: 29 June - 4 July , 2008
dc.descriptionConference name: Acoustics '08 - European Conference on Noise Control 2008
dc.description.abstractThe design of a high power piezoelectric underwater transducer operating at frequency range 40 kHz-80 kHz with acoustic power capability in excess of 250W is described. The transducer consists of two back-toback elements. Each element is formed by stacked PZT-4 ceramic rings, a matching and a steel backing layer, and placed in a finite rigid circular baffle. We investigate the dependence of bandwidth and beamwidth to the combination of piston and baffle radii, a and b, respectively. With ka of 2.45 (κ is the wave number) at resonance and a b/a ratio of 2, the transducer resonates at 60kHz with 67% bandwidth and has a beamwidth of 60° at each half space. We show that when two transducers are placed at right angles spatially and driven in parallel, we can obtain an omnidirectional beam pattern in the lower frequency band. The beam pattern exhibits two dips in each quadrant at the higher end of the frequency band, which are within 8 dB. We also investigated power handling capability of the transducer from thermal point of view using finite element analysis. The input impedance measurements agree well with the numerical results within the pass band.en_US
dc.source.titleProceedings - European Conference on Noise Controlen_US
dc.subjectFinite baffleen_US
dc.subjectHigh poweren_US
dc.subjectUnderwater acoustic transduceren_US
dc.subjectWide beamwidthen_US
dc.subjectFinite baffleen_US
dc.subjectHigh poweren_US
dc.subjectLower frequenciesen_US
dc.subjectNumerical resultsen_US
dc.subjectPower-handling capabilityen_US
dc.subjectUnderwater transducersen_US
dc.subjectWide beam widthsen_US
dc.subjectDirectional patterns (antenna)en_US
dc.subjectElectric impedance measurementen_US
dc.subjectFinite element methoden_US
dc.subjectFrequency bandsen_US
dc.subjectUnderwater acousticsen_US
dc.titleThe design of a wideband and widebeam piston transducer in a finite closed circular baffleen_US
dc.typeConference Paperen_US
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