Accelerated Tissue Heating from Inertial Cavitation Produced by High-Intensity Focused Ultrasound

Friday, February 25, 2005 4:00 p.m. Professor Ronald A. Roy Department of Aerospace and Mechanical Engineering Boston University http://www.bu.edu/ame Rapid tissue heating resulting in necrosis is a useful therapeutic modality for clinical application of high-intensity focused ultrasound (HIFU). At therapeutic intensities, acoustic hyperthermia is often accompanied by bubble activity. In vitro and in vivo experiments…

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Acoustics Seminars

Measurement and Evaluation of the Acoustic Quality of Violins

Friday, February 11, 2005 4:00 p.m. Alex Mayer Institute for Musical Acoustics The University for Music and Performing Arts, Vienna and Todd Hay Department of Electrical and Computer Engineering The University of Texas at Austin http://www.ece.utexas.edu For nearly 25 years the Institute for Musical Acoustics (IMA) in Vienna has been developing simulation, measurement and optimization…

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Acoustics Seminars

Cochlear Implants

Friday, February 4, 2005 4:00 p.m. Patrick W. Slater, M.D., Neurotologist, and Amy L. Gensler, M.A., Cochlear Implant Audiologist Austin Ear Clinic Home Cochlear implants are life-changing prosthetic devices that can dramatically improve hearing for people with severe-to-profound sensorineural hearing loss. This discussion will focus on all aspects of cochlear implants. Dr. Patrick Slater is…

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Acoustics Seminars

Tour of Acoustic Systems

Friday, December 3, 2004 4:00 p.m. William McKenna Acoustic Systems http://www.ets-lindgren.com/page/?i=Acoustics Acoustic Systems, located in Austin, Texas, has been designing, manufacturing, and installing acoustical products since 1971. While Acoustic Systems does offer standard products, our focus is on custom designs, manufactured per customer specifications. Acoustic Systems is staffed by highly qualified sales professionals who work…

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Acoustics Seminars

Simulation of shallow-water reverberation and geoacoustic characterization

Friday, October 15, 2004 4:00 p.m. Tom Yudichak Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu An important reverberation mechanism in underwater environments is the scattering of sound from random inhomogeneities, such as fluctuations in sound speed and density, throughout sediment layers. The scattering strength of the sediment in such cases depends in…

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Acoustics Seminars

Seabed characterization on the New Jersey middle and outer shelf: Correlability and spatial variability of geological and geoacoustic properties

Friday, October 8, 2004 4:00 p.m. John Goff Institute for Geophysics, Jackson School of Geosciences The University of Texas at Austin http://www.ig.utexas.edu http://www.geosci.utexas.edu Nearly 100 collocated grab samples and in situ 65 kHz acoustic measurements were collected on the New Jersey middle and outer shelf within an area that had previously been mapped with multibeam…

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Acoustics Seminars

The Application of Current Audio Analysis Techniques to Electro-acoustic Music for the Purpose of Visualization

Friday, October 1, 2004 4:00 p.m. Anderson Mills Department of Electrical and Computer Engineering The University of Texas at Austin http://www.ece.utexas.edu Electro-acoustic music has been ignored by music theorists for years. One theory suggests that this deficiency is due to the lack of an objective visual representation of this type of music. This research is…

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Acoustics Seminars

Church Opal – 1975, Recovery and Analysis of Archival Data

Friday, September 24, 2004 4:00 p.m. Jack Shooter Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu In October 2002 the Office of Naval Research (ONR) sponsored a Convocation that reviewed the ocean acoustic studies done from 1967 to 1992 under the U.S. Navy’s Long Range Acoustic Propagation Project (LRAPP). Beginning in 1972 LRAPP…

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Acoustics Seminars

The Interesting Effects of Added Complexity: The Acoustics of Elastic Waveguides and Liquid-Filled Impedance Tubes

Friday, September 10, 2004 4:00 p.m. Professor Preston S. Wilson Department of Mechanical Engineering The University of Texas at Austin http://www.me.utexas.edu The impedance tube has been used to study the acoustic properties of materials in air for years and is a mature technology. The acoustic absorption of ceiling tiles and automobile mufflers are typical examples,…

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Acoustics Seminars

Exploring Medical and Industrial Applications of Time Reversal Acoustics

Friday, April 23, 2004 4:00 p.m. Dr. Armen Sarvazyan Artann Laboratories, Inc. Lambertville, NJ The concept of Time Reversal Acoustics (TRA) developed by Mathias Fink provides elegant possibilities for both temporal and spatial concentration of acoustic energy in inhomogeneous composite media. Furthermore, numerous reflections from boundaries, which distort focusing in conventional focused ultrasound systems and…

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Acoustics Seminars

Contrast Ultrasound Imaging and Local Drug Delivery

Monday, March 8, 2004 3:00 p.m. Professor Katherine Ferrara Department of Biomedical Engineering University of California, Davis http://www.bme.ucdavis.edu Ultrasound contrast agents are small microbubbles with a thin shell and a resonance frequency in the range of clinical ultrasound instruments (1-5 MHz). We have developed a model for their oscillation in response to ultrasound pulses and…

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Acoustics Seminars

Novel Strategies for Beam Formation: Line-by-Line Acquisition Zone Acquisition

Friday, February 27, 2004 4:00 p.m. Tom Jedrzejewicz Medical Ultrasound Consultant Formerly with Siemens Medical Solutions http://www.medical.siemens.com The traditional line-by-line strategy to acquire ultrasound echo is described and compared to zone-based technique for real-time B-mode imaging. The zone technique utilizes a broad transmit beam from which many receive beams are formed, such that a full…

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Acoustics Seminars

Geoacoustic Inverse Problems for Sound Transmission in Shallow Seas

Friday, February 13, 2004 4:00 p.m. Dr. David P. Knobles Applied Research Laboratories The University of Texas at Austin http://www.arlut.utexas.edu Sound transmission in shallow seas is significantly influenced by the geophysical structure of the seabed, both at the surface and beneath the seafloor. The reasons include the proximity of the seafloor to the water-air interface…

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Acoustics Seminars

Using Otoacoustic Emissions as a Window into Hormonal Events during Prenatal Development

Friday, January 30, 2004 4:00 p.m. Professor Dennis McFadden Department of Psychology The University of Texas at Austin http://www.psy.utexas.edu The normal cochlea contains a series of elements known as the cochlear amplifiers. As a harmless by-product, these amplifiers produce sounds called Otoacoustic Emissions (OAEs). OAEs exhibit sex differences that are present in newborns as well…

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Acoustics Seminars

Tour of Acoustic Systems

Friday, December 5, 2003 4:00 p.m. Bill McKenna Acoustic Systems http://www.acousticsystems.com This tour is a class field trip for Engineering Acoustics (ME 379N, EE 363N), but it is open to the public. Acoustic Systems, located in Austin, Texas, has been designing, manufacturing, and installing acoustical products since 1971. While Acoustic Systems does offer standard products,…

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Acoustics Seminars