Friday, October 15, 2010 4:00 p.m. in ETC 4.120 David A. Nelson, INCE Bd. Cert., P.E. Principal Consultant, Nelson Acoustics Consultant in Noise Control for Products, Equipment, Industry, and the Environment There are few activities that define the “Austin experience” better than sitting under the stars with friends, sipping a cool beverage, and listening to…
Friday, October 8, 2010 4:00 p.m. in ETC 4.150 Professor Pei Zhong Department of Mechanical Engineering and Materials Science Duke University http://www.mems.duke.edu/fds/pratt/MEMS/faculty/pzhong Acoustic cavitation is known to play a pivotal role in a diverse range of biomedical applications, including cancer therapy, drug/gene delivery, and shock wave lithotripsy. We have recently developed a new method based…
Friday, October 1, 2010 4:00 p.m. in ETC 4.120 Professor Jinying Zhu Department of Civil, Architectural and Environmental Engineering The University of Texas at Austin http://www.ce.utexas.edu/ Elastic wave-based non-destructive testing (NDT) methods are effective for flaw detection in concrete structures and pavements. With the recent developments in computing hardware and software, imaging techniques have become…
Friday, September 24, 2010 4:00 p.m. in BME 3.204 Professor Stanislav Y. Emelianov Ultrasound, Imaging, and Therapeutics Research Laboratory Department of Biomedical Engineering The University of Texas at Austin Ultrasound-guided photoacoustics is a high-resolution and high-sensitivity imaging technique where ultrasound is used to visualize anatomical structures and photoacoustics is used to provide functional information about…
Friday, September 10, 2010 4:00 p.m. in ETC 4.120 Chad N. Himmel, P.E. JEAcoustics Austin, Texas http://www.jeacoustics.com/ Sensitive imaging instruments for research and diagnosis, including magnetic resonance imaging units (MRI), computerized tomography (CT) scan systems, and scanning and transmission electron microscopes, analyze specimens at millimeter, micron, and sub-micron detail. Such instruments are often affected by…
Friday, September 3, 2010 4:00 p.m. in ETC 4.120 Andrew McNeese Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/ This seminar describes the development and testing of the Combustive Sound Source (CSS), which is a broadband underwater sound source. The CSS is being developed as a clean, safe, and cost effective replacement to…
Friday, August 27, 2010 4:00 p.m. in ETC 4.120 Dr. Eru Kurihara Division of Mechanical and Space Engineering Hokkaido University Sapporo, Japan http://www.hokudai.ac.jp/en/ and Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/ The interaction of bubbles in close proximity to one another can play an important role in applications of biomedical acoustics that…
Friday, April 30, 2010 4:00 p.m. in ETC 4.120 Lia B. Kashdan The Product, Process and Materials Design Lab Department of Mechanical Engineering and Applied Research Laboratories The University of Texas at Austin http://www.me.utexas.edu/ Constrained negative stiffness elements in small quantities (1% to 2% by volume) implemented within viscoelastic materials have been shown to provide…
Thursday, April 15, 2010 3:30 p.m. in WRW 113 Professor Kenneth S. Brentner Department of Aerospace Engineering The Pennsylvania State University http://www.aero.psu.edu A great deal of progress has been made toward the prediction of rotor noise over the past three decades. Although the modeling effort has focused on helicopter main rotors, the theory is generally…
Friday, April 9, 2010 4:00 p.m. in ETC 4.120 Professor Loukas F. Kallivokas Department of Civil, Architectural and Environmental Engineering The University of Texas at Austin http://www.ce.utexas.edu/ Recent progress in the full-waveform imaging of probed solids/soils is discussed, with geotechnical and geophysical applications in mind. Of particular interest are arbitrarily heterogeneous domains, whose semi-infinite extent…
Friday, April 2, 2010 4:00 p.m. in ETC 4.120 Chad A. Green Mechanical Engineering Department and Applied Research Laboratories The University of Texas at Austin http://www.me.utexas.edu/ Methane hydrates are ice-like substances found in ocean sediments. These naturally-occurring solids are of interest as a potential energy source and as a potential contributor to global climate change.…
Friday, March 26, 2010 4:00 p.m. in ETC 4.120 Dr. Pawel J. Matuszyk Center for Petroleum & Geophysical Systems Engineering The University of Texas at Austin http://www.cpge.utexas.edu/ Sonic logging has been used extensively by oil companies to measure the porosity, permeability, and mechanical properties of formation rocks. The finite element method (FEM) can accurately model…
Friday, March 12, 2010 4:00 p.m. in ETC 4.120 Jeffrey Zitelli Institute for Computational Engineering and Sciences The University of Texas at Austin http://www.ices.utexas.edu Finite element methods generally require more computational resources than other numerical schemes which are often employed to predict acoustic wave propagation in shallow-water waveguides. However, finite elements have an important role…
Friday, March 5, 2010 4:00 p.m. in ETC 2.136 Professor F. Levent Degertekin George W. Woodruff Chair in Mechanical Systems George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology http://www.me.gatech.edu/faculty/degertekin.shtml Capacitive micromachined ultrasonic transducers (CMUTs) have emerged as an enabling technology for ultrasound imaging, especially for applications requiring highly dense 2-D arrays and…
Friday, February 26, 2010 10:00 a.m. in RLM 11.204 Dr. Marcia J. Isakson Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/ Understanding acoustic propagation in littoral waters is critical to ocean mammal tracking, underwater communications, and bottom mapping. However, the coastal water environment is extremely complex. Variations in water temperature, pressure, and salinity…
Friday, February 19, 2010 4:00 p.m. in ETC 4.120 Benjamin King Center for Nonlinear Dynamics and Department of Physics The University of Texas at Austin http://chaos.utexas.edu/ Internal gravity waves in the ocean transfer energy from large scale tidal motions to small scale turbulence and mixing. Understanding their generation and subsequent propagation is critical to improving current…
Friday, February 12, 2010 4:00 p.m. in ETC 4.120 Jack B. Evans, P.E. and Chad N. Himmel, P.E. JEAcoustics Austin, Texas http://www.jeacoustics.com/ Noise, vibration and acoustical design, construction, commissioning practices, and operation practices influence building cost, efficiency, performance, and effectiveness. Parameters for structural vibration, building systems noise, acoustics noise, and environmental noise that crosses property boundaries will…
Friday, February 5, 2010 4:00 p.m. in ETC 4.120 Dr. Kevin M. Lee Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/ Drilling operations are currently prohibited in the Arctic Ocean due to a variety of environmental concerns, including the effect of underwater noise on marine mammals. It is well known that bubbles cause significant…
Friday, January 29, 2010 4:00 p.m. in ETC 4.120 Professor Su-Hyun Jin Department of Communication Sciences and Disorders The University of Texas at Austin http://csd.utexas.edu/ In a previous study of hearing-impaired (HI) listeners’ speech perception in noise (Jin and Nelson, 2004), two factors emerged as highly related to amplified sentence recognition in the presence of fluctuating…
Friday, November 20, 2009 4:00 p.m. in ETC 4.150 Christopher S. Allen NASA Johnson Space Center Houston, Texas hefd.jsc.nasa.gov/acoustics.htm It is important to control sound levels on manned space flight vehicles and in habitats to protect the hearing of the crew, allow for voice communications, and to ensure a healthy and habitable environment in which…