Friday, November 13, 2009 4:00 p.m. in ETC 4.120 Matthew D. Guild Applied Research Laboratories The University of Texas at Austin www.arlut.utexas.edu The topic of acoustical cloaking has gained significant attention in recent years due to the successful creation of electromagnetic cloaks using metamaterials. Two specific approaches have been suggested to successfully construct acoustical cloaks:…
Friday, November 6, 2009 4:00 p.m. in Burdine 208 Professor Robert I. Damper School of Electronics and Computer Science University of Southampton Southampton, UK www.isis.ecs.soton.ac.uk/areas/?view=speech Human speech is a complex biological and social phenomenon. Historically, in among the morass of complexity, it has not always been clear precisely what is the explanandum (the phenomenon or…
Friday, October 23, 2009 4:00 p.m. in ETC 4.150 Dr. Nellie I. Pushkina Scientific Research Computing Center Moscow State University Moscow, Russia www.srcc.msu.su/nivc/index_engl.htm Quantum liquids present a very good opportunity for studying sound and sound-like wave processes. In these fluids there exist a number of various types of weakly damped excitations not present in classical…
Friday, October 16, 2009 4:00 p.m. in ETC 4.120 Dr. David J. Scheibner Schlumberger Sugar Land, Texas Fuchinobe, Japan www.slb.com The use of acoustic waves to measure earth formations spans a wide range of frequencies, from seismic to ultrasonic. This presentation will focus on the middle range, from 300 Hz to 30 kHz, in what…
Friday, October 9, 2009 4:00 p.m. in ETC 4.120 Professor George D. Pollak Section of Neurobiology School of Biological Sciences The University of Texas at Austin www.utexas.edu/neuroscience/Neurobiology/GeorgePollak/index.html Bats are best known for their echolocation abilities but they also are among the most colonial of mammals, living in caves with populations that can number in the…
Friday, October 2, 2009 4:00 p.m. in ETC 4.120 Dr. Nicholas P. Chotiros and Dr. Marcia J. Isakson Applied Research Laboratories The University of Texas at Austin www.arlut.utexas.edu Measurements in sandy ocean sediments over a broad range of frequencies show that the sound speed dispersion is significantly greater than that predicted by the standard Biot-Stoll…
Friday, September 25, 2009 4:00 p.m. in ETC 4.120 Amy Gensler, M.A., Cert. AVT Austin Ear Clinic Austin, Texas www.austinear.com Cochlear implants are life-changing prosthetic devices that can dramatically improve hearing and speech perception for people with severe-to-profound sensorineural hearing loss. Cochlear implant technology is much improved today compared to technology first commercially released in…
Friday, September 18, 2009 4:00 p.m. in ETC 4.120 Dr. Todd A. Hay Applied Research Laboratories The University of Texas at Austin www.arlut.utexas.edu The behavior of ultrasound contrast agent (UCA) microbubbles in confining environments is relevant for several biomedical applications including imaging and targeted drug delivery. This talk will focus on experiments and associated modeling…
Friday, September 4, 2009 4:00 p.m. in ETC 4.120 Dr. Mark S. Wochner Applied Research Laboratories The University of Texas at Austin www.arlut.utexas.edu The time-dependent nature of mammalian lung damage due to acoustic excitation at the lung’s resonance frequency has been demonstrated by Dalecki and coworkers at The University of Rochester. A finite-element-based model of…
Friday, May 29, 2009 10:00 a.m. in the ARL Auditorium Dr. Wheeler Howard Miltec Research and Technology Oxford, Mississippi www.ducommun.com/miltec/mrt Soils overlying naturally occurring hardpans, such as caliche or fragipan, normally experience decreased crop yield and increased erosion rates. Mapping these layers on a field scale would permit the judicious distribution of hydraulic and agricultural…
Friday, May 1, 2009 4:00 p.m. in ETC 4.120 Professor Dennis McFadden and Kyle P. Walsh Department of Psychology and Center for Perceptual Systems The University of Texas at Austin www.psy.utexas.edu In all sensory systems, the incoming stimulus information is subjected to numerous stages of processing as it moves from the periphery to the cortex,…
Friday, April 24, 2009 4:00 p.m. in ETC 4.150 Andy Miller BAi, LLC Austin, Texas www.baiaustin.com Two case studies help illustrate the focus of this seminar: The University of South Florida School of Music’s new music building and the renovation of a 1962 high school auditorium in Temple, Texas. The new School of Music in…
Friday, April 17, 2009 4:00 p.m. in ETC 4.120 Professor Chang Liu Department of Communication Sciences and Disorders The University of Texas at Austin http://csd.utexas.edu Many studies have shown that spectral prominences of vowel sounds, called formants, are important for vowel categorization, especially the first two formant frequencies (F1 and F2). Listeners rely on the…
Friday, April 10, 2009 4:00 p.m. in ETC 4.120 Alexander T. Baugh The Institute for Neuroscience The University of Texas at Austin www.neuroscience.utexas.edu Interest in the question of when and how species recognition and mate preferences emerge in animals with strong species-typical predispositions has faded since the time of the classical ethologists. In its place,…
Friday, March 13, 2009 4:00 p.m. in ETC 4.150 Professor Leszek F. Demkowicz Department of Aerospace Engineering and Engineering Mechanics Assistant Director, Institute for Computational and Engineering Sciences The University of Texas at Austin www.ices.utexas.edu In finite element modeling, hp-adaptive methods allow for locally varying element size, h, and polynomial order, p, combining the strengths…
Friday, March 6, 2009 4:00 p.m. in ETC 4.120 Dr. Douglas F. Winker ETS-Lindgren Acoustic Systems Cedar Park, Texas www.ets-lindgren.com This presentation will focus on the design and construction of a new acoustic lab facility in Cedar Park, Texas. Acoustic Systems was purchased by ETS-Lindgren in 2002. In January 2008, the Acoustic Systems facility in…
Friday, February 27, 2009 4:00 p.m. in ETC 4.120 Professor Neal A. Hall Department of Electrical and Computer Engineering The University of Texas at Austin www.ece.utexas.edu 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…
Friday, February 20, 2009 4:00 p.m. RLM 7.104 Professor David T. Blackstock Department of Mechanical Engineering and Applied Research Laboratories The University of Texas at Austin http://www.me.utexas.edu When two intense primary sounds of different frequencies propagate together, their nonlinear interaction produces various distortion components. Particularly interesting is the difference frequency component, which is at the…
Friday, February 13, 2009 4:00 p.m., ETC 4.120 Karin L. Akre and Professor Michael J. Ryan Section of Integrative Biology The University of Texas at Austin http://www.biosci.utexas.edu/ib Female túngara frogs (Physalaemus pustulosus) use male acoustic signals to make mate choice decisions. Males produce advertisement calls of variable complexity. They produce frequency-modulated vocalizations, called whines, and…
Wednesday, February 4, 2009 4:00 p.m. BME 3.204 Dr. Jeffrey A. Ketterling Riverside Research Institute New York, New York http://www.rri-usa.org/biomed.php This seminar will focus on recent work involving high-frequency ultrasound (HFU) transducers (>20 MHz) that are widely used for fine-resolution ophthalmic and small-animal imaging. Most HFU imaging is now performed with single-element, focused transducers. These…