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Detection of Oil Under Ice: An Acoustic Reverberation Method

Event Date/Time
Event Location
3540 Seminar Room EB
Speaker
David Baumann, PhD & Edoardo Sarda, PhD
Event Description
LSSU Seminar 2019

Canadian Studies Center
Department of Civil and Environmental Engineering
Michigan State University
David Baumann Edoardo Sarda
Professor,
Electrical and Computer Engineering
Assistant Professor,
Robotics Engineering
School of Engineering and Technology
Lake Superior State University
Sault Ste. Marie, MI
Detection of Oil Under Ice:
An Acoustic Reverberation Method
Monday, October 14, 2019
noon-1pm
3540 Engineering Building
Abstract
Through new exploration and aging infrastructure, there is an ever-increasing risk of oil
spills or leaks into natural bodies of water, but presently there is no low-cost method to
actively monitor for such spills under ice cover, particularly not any method giving rapid
coverage of a large area. Therefore, a method based on acoustic reverberation time
under the ice was investigated. A broadband, impulsive acoustic source generating a
frequency band of 10–90 kHz was used in a water tank with a layer of naturally-grown
ice in a scaled feasibility study of this method; this band provided appropriately short
wavelengths, scaled for the small tank environment. Reflections from the tank walls
were minimized, and a diffuse environment within the tank allowed for extraction of a
reverberation time with a hydrophone. Results show an oil presence changed the
reverberation time as compared to an oil-free ice layer across all diffuse frequency
bands.

Presenters:
David C. Baumann received BS, MS, and PhD degrees in
Electrical Engineering from the University of Wisconsin - Madison
in 1987, 1989, and 1992 respectively, conducting his research
under Dr. R. A. Greiner in the UW Electro-Acoustics Laboratory.
He also received an MS degree from the University of Wisconsin
- Madison in 1993. He is a Professor in the Department of
Electrical and Computer Engineering at Lake Superior State
University. His expertise lies in the areas of acoustics, vibration,
and adaptive control.
Edoardo I. Sarda received the B.S. degree in mechanical
engineering from Lake Superior State University, Sault Ste.
Marie, MI, USA, in 2012, the M.S. and Ph.D. degree in ocean
systems engineering from Florida Atlantic University, Dania
Beach, FL, USA, in 2016. He is a former R&D Engineer in the
field of collaborative and mobile robotics. He is currently an
Assistant Professor of Robotics Engineering at Lake Superior
State University, Sault Ste. Marie, MI, USA. His expertise is in
autonomous vehicles, mobile robotics, human-robot collaboration,
automated systems and modern control.
Co-author:
Robert L. Hildebrand is Associate Professor of Mechanical
Engineering at Lake Superior State University, having received
his PhD degree in Acoustics from KTH (Royal Institute of
Technology) in Stockholm, 2001, with earlier degrees from the
University of Michigan-Ann Arbor (BS Mechanical Engineering,
1990) and the University of Nebraska-Lincoln (MS Engineering
Mechanics, 1994). He has some industry background as a
design engineer, and post-doctoral work pursued at the Mexican
Institute of Transportation, and at Tampere University of
Technology, Finland, the latter as an Academy of Finland
Fellowship. His research spans areas of acoustics, vibrations,
vehicle dynamics, soil dynamics (seismic survey methods), and
terramechanics (soil-vehicle and soil-structure interactions).