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32. D. Norris and R. Gibson, “Advanced Tools for Infrasonic Modeling,” InfraMatics, No. 5, 13–19 (2004).
33. M.A.H. Hedlin, B. Alcoverro, and G. D’Spain, “Evaluation of rosette infrasonic noise-reducing spatial filters,” J. Acoust. Soc. Am. 114, 1807-1820 (2003).
34. A. Alcoverro and A. Le Pichon, “Design and optimization of a noise reduction system for infrasonic measurements using ele- ments with low acoustic impedance,” J. Acoust. Soc. Am. 117, 1717–1727 (2005).
35. M.A.H. Hedlin and R. Raspet, “Infrasonic wind-noise reduc- tion by barriers and spatial filters,” J. Acoust. Soc. Am. 114, 1379-1386 (2003).
36. F.D. Shields, “Low-frequency wind noise correlation in microphone arrays,” J. Acoust. Soc. Am. 117, 3489-3496 (2005).
37. M. Zumberge, J. Berger, M.A.H. Hedlin, E. Husmann, S. Nooner, R. Hilt, and R. Widmer-Schnidrig, “An optical fiber infrasound sensor: A new lower limit on atmospheric pressure noise between 1 and 10 Hz.,” J. Acoust. Soc. Am. 113, 2474-2479 (2003).
38. H.E. Bass, et al., Report to the Department of Defense on Infrasonic Re-entry Signals From the Space Shuttle Columbia (STS-107) (Revision 3.0), Eos Trans. AGU, 84(46), Fall Meet. Suppl. (2003).
39. M. Garcés, C. Hetzer, H. Bass, M. Hedlin, K. Lindquist, J. Olson, C. Wilson, D. Drob, and M. Picone, “Forensic studies of infra- sound from massive hypersonic sources,” EOS, 85(43), 433–440 (2004).
Henry E. Bass joined the Physics faculty of the University of Mississippi in 1970, and was appointed Frederick A. P. Barnard Distinguished Professor in 1988. He served as Acting Chairman, Department of Physics and Astronomy, Acting Director of the Acoustics Research and Development Division of the Institute for Technology Development and as
Director of the Jamie L. Whitten National Center for Physical Acoustics since 1992. He was a visiting Distinguished Professor of Physics at the Naval Postgraduate School, 1989- 1990 and a Visiting Professor of Physics at the University of Utah, 2002-2003. He holds B. S. and Ph.D. degrees from Oklahoma State University. In 1978, Dr. Bass received the Biennial Award from the Acoustical Society of America. He was Director of the 1994, 1996, 1998, 2000 and 2002 Physical Acoustics Summer Schools. He currently serves as leader of the Department of Defense U.S. Infrasound Team.
Joydeep Bhattacharyya received
his Ph.D. in Earth Sciences (1996)
from Scripps Institution of
Oceanography in San Diego.
Subsequently, he held postdoctor-
al positions at Lawrence
Livermore National Laboratory
and at Yale University and was a
visiting fellow at the University of
Colorado at Boulder. Currently, he
is a senior scientist with BBN
Technologies in Arlington,
Virginia. His research interests include wave propagation, sig- nal processing, geospatial analysis, and signal fusion.
Currently he is involved in several research projects that com- bine seismological and acoustic datasets of well-calibrated events to improve our understanding of wave propagation through air, water and solid earth. Prior to joining BBN, he was with Science Applications International Corporation (SAIC) where he worked on various topics related to the Nuclear Test Ban Treaty monitoring. He is a member of the American Geophysical Union and the Society of Exploration Geophysicists and has served as a member of several U.S. del- egations at international meetings.
Milton A. Garcés has expanded his early interest in volcano acoustics to the study of global infrasound from natural and man-made sources, and founded the Infrasound Laboratory (ISLA) of the University of Hawai’i for the development of infrasound research and technol- ogy. One of his primary projects involves the operation of stations in the Pacific and Indian Oceans
that are part of the global infrasound network of the International Monitoring System. Under Dr. Garcés’ direction, the ISLA has collaborated with national and international organizations in the analysis of signals associated with the April 23, 2001 superbolide explosion, the February 2003 Columbia disaster, and the December 26, 2004 Sumatra earth- quake and tsunami. In addition to the nuclear monitoring projects, ongoing projects include the development of acoustic monitoring techniques that provide low-latency volcanic erup- tion warnings to the aviation community, the identification and modeling of low frequency sound from ocean processes, community building efforts in the formation of an International Infrasound Consortium, and education and out- reach in the Geosciences.
18 Acoustics Today, January 2006