Author Archives: hamilton@mail.utexas.edu

Unusual Observations During Speed of Sound Experiments in the Arctic in the 1820’s and their Effect on the Development of Nonlinear Acoustics

date November 14, 1984
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Wednesday, November 14, 1984 12:00 p.m. David T. Blackstock Applied Research Laboratories The University of Texas at Austin In 1821-22, during an exploration voyage to northern North America to try to discover a “Northwest Passage” […]

Pictures at an Exhibition: Wind Turbines

date November 7, 1984
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Wednesday, November 7, 1984 12:00 p.m. Jim Hawkins Applied Research Laboratories The University of Texas at Austin The U.S. Government has built and is operating several wind turbine systems as part of its Federal Wind Energy […]

Generic Models of Spatially Distributed Transducers

date October 31, 1984
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Wednesday, October 31, 1984 12:00 p.m. Ilene Busch-Vishniac Department of Mechanical Engineering The University of Texas at Austin The typical means of modeling a transducer is to represent its behavior using discrete lumped elements. In […]

Transient Response of an Electret Microphone

date October 24, 1984
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Wednesday, October 24, 1984 12:00 p.m. Whang Cho Department of Mechanical Engineering The University of Texas at Austin Simplified analysis shows that the decay rate of the transient response decreases as the frequency mode increases.

The Diverging Sound Field of a Spherical Piston

date October 17, 1984
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Wednesday, October 17, 1984 12:00 p.m. Halvor Hobæk Department of Physics The University of Bergen Bergen, Norway Computations show that the nearfield of a spherical piston -in the sense that the directional properties are dependent on range- […]

The Directivity of a Laser-induced Thermoacoustic Array

date September 26, 1984
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Wednesday, September 26, 1984 12:00 p.m. Yves H. Berthelot Applied Research Laboratories The University of Texas at Austin A thermoacoustic array can be generated by modulating the intensity of a laser beam illuminating a liquid. […]

Nonlinear Effects in Sound Beams

date September 19, 1984
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Wednesday, September 19, 1984 12:00 p.m. Professor Mark F. Hamilton Department of Mechanical Engineering The University of Texas at Austin Finite amplitude propagation of directional sound beams is well modeled by Kuznetsov’s paraxial wave equation, […]

Stochastic Differential Equations for the Masses

date September 12, 1984
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Wednesday, September 12, 1984 12:00 p.m. Alex Garcia Applied Research Laboratories The University of Texas at Austin The field of ordinary Stochastic Differential Equations (SDE) has in the past 20 years progressed from the dangerous […]