Friday, March 28, 2014 4:00 p.m. ETC 4.150 Professor Bin Liang Institute of Acoustics Department of Physics Nanjing University Nanjing, China http://acoustics.nju.edu.cn/ Acoustic waves have long been thought to propagate as easily along two opposite directions in a given path. It can therefore be expected that the one-way propagation of acoustic waves, if could it…
Friday, March 21, 2014 4:00 p.m. ETC 4.150 Dr. Manuel Trevino Center for Transportation Research The University of Texas at Austin http://www.utexas.edu/research/ctr/ Noise associated with highway transportation has progressively become a nuisance to communities along roads. As transportation of people and goods continues to grow, roads expand, and noise levels rise. Nowadays, transportation agencies have…
Friday, March 7, 2014 4:00 p.m. ETC 4.150 Alexander S. Hannah Department of Biomedical Engineering The University of Texas at Austin http://www.bme.utexas.edu Disease detection by noninvasive imaging requires contrast against the surrounding healthy tissue, which is insufficient using many available techniques, including clinical ultrasound (US) and recently emerging photoacoustics (PA). The introduction of exogenous contrast…
Friday, February 28, 2014 4:00 p.m. ETC 4.150 Professor Zheng Wang Department of Electrical and Computer Engineering The University of Texas at Austin http://www.ece.utexas.edu Active fiber devices that can be electrically modulated at high frequencies promise a wide range of novel applications in energy transduction, sensing, and communications. I will present a novel technique of…
Friday, February 21, 2014 4:00 p.m. ETC 4.150 Donghwan Kim Department of Electrical and Computer Engineering Microelectronics Research Center The University of Texas at Austin https://www.mrc.utexas.edu Microelectromechanical-system (MEMS) microphones with optical readout have been previously demonstrated. These microphones are similar to capacitive MEMS microphones, but the optical microphone can achieve potentially higher signal-to-noise ratio. The…
Friday, February 7, 2014 4:00 p.m. ETC 2.136 Dr. Thomas D. Kite Audio Precision, Inc. Beaverton, OR Home Digital infinite impulse response (IIR) filters are popular in audio signal processing applications because they typically have a much lower computational cost than finite impulse response (FIR) filters designed to the same specifications. However, IIR filter design…
Friday, January 31, 2014 12:00 p.m. ETC 2.136 Professor Christy K. Holland Department of Internal Medicine and Biomedical Engineering Program University of Cincinnati http://www.ultrasound.uc.edu/people.html Ultrasound is under development as a potent promoter of beneficial bioeffects for the treatment of cardiovascular disease. These effects can be mediated by mechanical oscillations of circulating microbubbles, referred to as…
Friday, January 31, 2014 4:00 p.m. ETC 4.150 Daniel R. Tengelsen Department of Mechanical Engineering and Applied Research Laboratories The University of Texas at Austin https://www.arlut.utexas.edu A Lagrangian formalism used previously to calculate the pulsation of a spherical bubble immersed in liquid and adjacent to a viscoelastic layer is extended here to include bubble translation. Previous models and experiments…
Friday, January 24, 2014 4:00 p.m. ETC 4.150 Dr. Damir B. Khismatullin Department of Biomedical Engineering Tulane University https://tulane.edu/sse/bme Focused ultrasound (FUS) emerges as a powerful technology for noninvasive, or minimally invasive, non-ionizing treatment of cancer and many other diseases. When operated at high intensity, FUS deposits a large amount of acoustic energy at the focal region…
Friday, January 17, 2014 4:00 p.m. ETC 4.150 Dr. Dustin G. Reichard Department of Evolution and Ecology University of California, Davis http://www-eve.ucdavis.edu Across the animal kingdom, acoustic signals serve a variety of important functions in aggression, mate attraction, courtship, and alarm-related signaling. Previous research on the function of acoustic signals has focused predominantly on high-amplitude…
Friday, November 15, 2013 4:00 p.m. in ETC 4.150 Kyle S. Spratt and Gregory R. Enenstein Applied Research Laboratories and Mechanical Engineering Department The University of Texas at Austin http://www.arlut.utexas.edu/ http://www.me.utexas.edu/ The topics discussed are related to the acoustics of air bubbles in water, with applications in underwater noise abatement and the acoustics of fish schools. …
Friday, November 8, 2013 4:00 p.m. in ETC 4.150 Craig Janssen Managing Director Acoustic Dimensions Dallas, Texas http://www.acousticdimensions.com/index.html Acoustic Dimensions has been fortunate to serve as the acoustics and technology consultant for dozens of major sports venues and hundreds of large assembly event centers worldwide. The technology design at the Circuit of the Americas will…
Friday, November 1, 2013 4:00 p.m. in ETC 4.150 Professor Chang Liu Department of Communication Sciences and Disorders The University of Texas at Austin http://csd.utexas.edu/faculty/chang-liu It is well known that when listening in noise, English non-native listeners have more difficulty to perceive English speech sounds than English-native listeners. Previous work in our laboratory found that the…
Friday, October 25, 2013 4:00 p.m. in ETC 4.150 Andrew R. 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 for…
Friday, October 18, 2013 4:00 p.m. in ETC 4.150 Craig N. Dolder Applied Research Laboratories and Department of Mechanical Engineering The University of Texas at Austin http://www.arlut.utexas.edu/ http://www.me.utexas.edu/ This seminar covers two independent topics. The resonator sound speed technique has been used by researchers at the University of Texas at Austin to determine the acoustic effective medium properties…
Friday, October 4, 2013 4:00 p.m. in ETC 4.150 Professor Andrea Alù Department of Electrical and Computer Engineering The University of Texas at Austin http://users.ece.utexas.edu/~aalu In this talk, I will discuss our recent progress and research activity in the field of acoustic metamaterials, focused on the general objective of enhancing sound-matter interactions in artificial materials. I will show…
Friday, September 27, 2013 4:00 p.m. in ETC 4.150 David A. Nelson, INCE Bd. Cert., PE Principal Consultant, Nelson Acoustics Elgin, Texas http://www.nelsonacoustical.com/ The experience of product noise depends not just on the sound pressure level, but on a host of perceptual factors including loudness, spectral balance, tonality, and modulation. Overlaid atop these are social factors…
Friday, September 20, 2013 4:00 p.m. in ETC 4.150 Nicholas J. Joseph Applied Research Laboratories and Department of Mechanical Engineering The University of Texas at Austin http://www.arlut.utexas.edu/ http://www.me.utexas.edu/ Piezoelectric transducers with thin-shelled cylindrical geometry are often used to radiate axisymmetric acoustic fields underwater. This is achieved by generating a uniform electric field across the thickness…
Friday, September 13, 2013 4:00 p.m. in ETC 4.150 Kurt Veggeberg Business Development Manager, Sound and Vibration National Instruments Austin, Texas http://www.ni.com/soundandvibration/ http://sine.ni.com/cs/app/doc/p/id/cs-15675 Acoustic beamforming involves mapping noise sources using an acoustical array. It discerns the direction from which the sound originates by the time delays that occur as the sound passes over an array…
Friday, September 6, 2013 4:00 p.m. in ETC 4.150 Dr. Marcia J. Isakson Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu/ Quantifying acoustic scattering from rough interfaces is critical for ocean acoustic applications, especially in shallow water waveguides. In this scenario, the sound has many interactions with both the air/water interface and the sediment/water interface. Scattering…