Friday, January 30, 2009 4:00 p.m. ETC 4.120 Professor Charles E. Tinney Department of Aerospace Engineering and Engineering Mechanics The University of Texas at Austin http://www.ae.utexas.edu The principle focus of this presentation is towards developing a better intuition for the mechanisms by which unbounded turbulent jet flows generate sound. The research was performed as part…
Monday, January 12, 2009 10:00 a.m. ARL Auditorium Dr. Timothy K. Stanton Woods Hole Oceanographic Institution Woods Hole, Massachusetts http://www.whoi.edu Since sound can travel such great distances in the ocean, it is an attractive tool for studying the spatial and temporal distributions of marine organisms such as fish and zooplankton over a large range of…
Friday, November 21, 2008 4:00 p.m., ETC 4.120 Dr. Valeria Garbin University of Twente The Netherlands pof.tnw.utwente.nl Contrast agent microbubbles are widely used in the field of ultrasound medical imaging to enhance contrast of ultrasound images and quantify organ perfusion, among many other applications. A full understanding of the behavior of these micron-scale bubbles under…
Friday, October 31, 2008 4:00 p.m., ETC 4.120 Dr. Keith H. Lent Advanced Technology Laboratory Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/atl/index.html Some initial results of the Long Range Imaging Sonar project at ARL will be presented in this seminar. The primary motivation for this project is to solve the diver identification…
Friday, October 24, 2008 4:00 p.m., ETC 4.120 Zachary J. Waters Department of Mechanical Engineering Boston University http://www.bu.edu/me The presence of noise and coherent returns from clutter often confound efforts to detect and identify targets buried in the ocean. Returns from a buried resonant target are enhanced by using iterative time reversal with a single…
Friday, October 17, 2008 4:00 p.m., ETC 4.120 Srivalleesha Mallidi Department of Biomedical Engineering The University of Texas at Austin http://www.bme.utexas.edu Cancer has become one of the leading causes of death. The early detection of cancer is absolutely necessary to decrease the mortality rate and also to obtain effective therapeutic outcomes. Advances in materials science…
Friday, October 10, 2008 4:00 p.m., ETC 4.120 David A. Nelson, INCE Bd. Cert., PE Principal Consultant, Nelson Acoustics Elgin, Texas Consultant in Noise Control for Products, Equipment, Industry, and the Environment A common early step in the design of a fan-cooled device is the selection of a cooling fan. The selection is usually made…
Friday, September 26, 2008 4:00 p.m., ETC 4.120 Jason D. Sagers Department of Mechanical Engineering Brigham Young University http://www.physics.byu.edu/Research/acoustics An analytical and experimental proof-of-concept is presented for a new feedback-controlled sound transmission control module for use in an active segmented partition (ASP) array. The objective of such a module is to provide high transmission loss…
Wednesday, September 17, 2008 4:00 p.m., ETC 4.120 Dr. Fernando Garcia-Osuna Schlumberger Sugar Land Integration Center (SPC) Sugar Land, Texas http://www.slb.com and Khalid H. Miah Department of Electrical and Computer Engineering The University of Texas at Austin http://www.ece.utexas.edu Acoustic wireless telemetry systems for logging and measurements while drilling (LWD/MWD) applications, the drill string being the…
Friday, September 12, 2008 4:00 p.m., ETC 4.120 Derek C. Thomas Department of Physics and Astronomy Brigham Young University http://www.physics.byu.edu/Research/acoustics In order to facilitate the acquisition and accurate interpretation of intensity and energy density data in high-amplitude pressure fields, the expressions for intensity and energy density are examined to ascertain the impact of nonlinear processes…
Friday, September 5, 2008 4:00 p.m., ETC 4.120 Theodore F. Argo IV Department of Mechanical Engineering and Applied Research Laboratories The University of Texas at Austin http://www.me.utexas.edu A better understanding of sound propagation in water-saturated granular sediments is required for improved shallow-water sonar performance and mine detection. For example, no existing first-principles model has accurately…
Friday, August 8, 2008 3:00 p.m. Jianying Cui Atkisson Department of Mechanical Engineering The University of Texas at Austin http://www.me.utexas.edu Ph.D. Dissertation Defense A model is developed for the dynamics of an acoustically driven bubble in a channel. The bubble is assumed to be smaller than the transverse dimension of the channel and spherical in…
Thursday, June 12, 2008 10:00 a.m. John Anderson Mills III Department of Electrical and Computer Engineering The University of Texas at Austin http://www.ece.utexas.edu Ph.D. Dissertation Defense Electroacoustic music is music that uses electronic technology for the compositional manipulation of sound, and analyzing this music requires special measures. A preliminary tool set to analyze percussivity and…
Wednesday, June 11, 2008 10:00 a.m. in ARL Auditorium Dr. Andrea Alu Department of Electrical and Systems Engineering University of Pennsylvania http://www.seas.upenn.edu/~andreaal/index.html The quest for miniaturizing and optimizing the performance of electromagnetic devices for numerous applications (wireless and optical communications, imaging, …) has fostered in recent years a strong interest in artificial materials, metamaterials and…
Thursday, May 15, 2008 3:30 p.m. in ACES 6.304 Professor Elizabeth S. Olson Department of Biomedical Engineering and Department of Otolaryngology/Head and Neck Surgery Columbia University http://www.entcolumbia.org Upon sound stimulation, the eardrum and ossicles are set in vibration. The stapes vibration pressurizes the cochlear fluids. Due to the cochlea’s geometry and its approximately symmetric division…
Friday, April 25, 2008 3:00 p.m. Todd A. Hay Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu Ph.D. Dissertation Defense Dynamical equations of motion are presented for the interaction of clustered spherical bubbles and solid particles suspended in liquid. Both the bubbles and particles are free to pulsate and translate, and bubble coalescence…
Friday, April 11, 2008 4:00 p.m. Megan S. Ballard Applied Research Laboratory The Pennsylvania State University http://www.arl.psu.edu Perturbative inversion, based on a linearized relationship between sound speed in the sediment and modal eigenvalues, is applied to data from the Shallow Water Experiment 2006. Data were collected by towing a low-frequency sound source out and back…
Friday, April 4, 2008 4:00 p.m. John Hadden CD Producer and Engineer London, England http://www.johnhadden.com The ultimate goal of a classical music engineer is to record a musical performance as realistically as possible, capturing the very subtle details of sound colors, onset transients and dynamics as well as the reverberation, reflections and diffraction of the…
Friday, March 21, 2008 4:00 p.m. Sarah Gourlie Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu Whole-body vibration of humans has been studied extensively since the 1950s, and now a new application for this work is found in an underwater environment. In this seminar, the response of a swimmer or diver to a…
Monday, March 3, 2008 10:00 a.m. Dr. Neal A. Hall Micro-Audio, LLC Atlanta, Georgia This presentation will summarize recent developments with micromachined microphones employing diffraction-based optical displacement detection. The approach has the advantage of providing high-displacement detection resolution of the microphone diaphragm, independent of device size and capacitance, creating an unconstrained mechanical and acoustical design…