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D'SPAIN, GERALD

Research Geophysicist

Degrees:

• B.A., University of California, Berkeley
• M.A., University of California, Berkeley
• Ph.D., UCSD, Scripps Institution of Oceanography

Research Interests:

• Coupling between seismic fields on land and offshore underwater acoustic fields, including those created by land vehicle activity and nuclear tests.
• Geophysical inversions with sources of opportunity.
• Properties of naturally occurring sounds in the ocean, including surf zone activity.
• Underwater vocalizations by marine mammals.
• Acoustic particle velocity and other measurable physical phenomena associated with underwater acoustic fields.
• Matched field processing.
• Infrasonic air acoustics.
• Interference patterns due to waveguide propagation.

Honors and Awards:

• Great Advances in Scientific Discovery, 1998
• Friends and Associates of the Earth Sciences fellowship, Department of Geology and Geophysics, U.C. Berkeley, 1978
• Phi Beta Kappa, U.C. Berkeley, 1976
• Graduation with highest honors, U.C. Berkeley, 1976

Mentoring:

• Lynch, Stephen (Post Doc; 2008-)
• Moskovitz, Brianne (Graduate; 2008-)
• Helble, Tyler (Graduate; 2007-)
• Nguyen, Nam (Undergrad; 2007-)
• Berchok, Catherine (Post Doc; 2005-2007)
• Madduri, P. Achintya (Masters; 2005-2008)
• Lepper, Paul (Post Doc; 2001-2003)
• Lynch, Stephen (Graduate; 2001-2008)

Lepper, P. A. and G. L. D'Spain (2007). "Measurement and modeling of the acoustic field near an underwater vehicle and implications for acoustic source localization," J. Acoust. Soc. Am. 122 (2), 892-905.

D'Spain, G. L., E. Terrill, C. D. Chadwell, J. A. Smith, and S. D. Lynch (2006). "Active control of passive acoustic fields: Passive synthetic aperture/Doppler beamforming with data from an autonomous vehicle," J. Acoust. Soc. Am. 120(6), 3635-3654.

D'Spain, G. L. and Batchelor, H. H. (2006). "Observations of biological choruses in the Southern California Bight - A chorus at mid-frequencies," J. Acoust. Soc. Am. 120 (4), 1942-1955.

D'Spain, G. L., C. D. Chadwell, R. Zimmerman, and G. Openshaw (2006). "High resolution repeat bathymetric surveys using AUVs," invited paper, World Maritime Technology Conference, Mar, 2006, 8 pgs.

D'Spain, G. L., D'Amico, A., and Fromm, D. M. (2006). "Properties of the underwater sound fields during some well documented beaked whale mass stranding events," J. Cetacean Res. Management. 7(3), 223-238. Cox, T. M., Ragen. T. J., Read, A. J., Vos, E., Baird, R. W., Balcomb, K., Barlow, J., Caldwell, J., Cranford, T., Crum, L., D'Amico, A., D'Spain, G., Fernandez, A., Finneran, J., Gentry, R., Gerth, W., Gulland, F., Hildebrand, J., Houser, D., Hullar, T., Jepson, P. D., Ketten, D., MacLeod, C. D., Miller, P.,Moore, S., Mountain, D, Palka, D., Ponganis, P., Rommel, S., Rowles, T., Taylor, B., Tyack, P., Wartzok, D., Gisiner, R., Mead, J., and Benner, L. (2006). "Understanding the impacts of anthropogenic sound on beaked whales," J. Cetacean Res. Management 7(3), 177-187.

D'Spain, G. L., Luby, J. C., Wilson, G., and Gramann, R. A. (2006). "Vector sensors and vector sensor line arrays: Comments on optimal array gain and detection," J. Acoust. Soc. Am. 120(1), 171-185.

Zimmerman, R., D'Spain, G. L., Chadwell, C. David (2005). "Decreasing the radiated acoustic and vibration noise of a mid-size AUV," IEEE J. Oceanic Engin. 30(1), 179-187.

Sabra, K. G., P. Roux, A. M. Thode, G. L. D'Spain, W. S. Hodgkiss, and W. A. Kuperman (2005). "Using ocean ambient noise for array self-localization and self-synchronization," IEEE J. Oceanic Engin. 30(2), 338-347.

Committee on Potential Impacts of Ambient Noise in the Ocean on Marine Mammals, Ocean Noise and Marine Mammals, National Research Council of the National Academies, Nat'l Academy Press, Wash D.C., 192 pgs, 2003.

Hedlin, M. A. H., Alcovarro, B., and D'Spain, G. L. (2003). "Evaluation of rosette infrasonic noise-reducing spatial filters," J. Acoust. Soc. Am. 114 (4), pt. 1, 1807-1820.

D'Spain, G. L., Rovner, G. L., Gerstoft, P., Kuperman, W. A., and Hodgkiss, W. S. (2002). "Determination of the waveguide invariant in general environments," U.S. Navy J. Underwater Acoustics, vol. 51, no. 1, pp. 123-142.

Kuperman, W. A., D'Spain, G. L., and Heaney, K. D. (2001). "Long range source localization from single hydrophone spectrograms," J. Acoust. Soc. Am. 109 (5) pt. 1, 1935-1943.

D'Spain, G. L., Murray, J. J., Hodgkiss, W. S., Booth, N. O., and Schey, P. W. (1999). "Mirages in shallow water matched field processing," J. Acoust. Soc. Am. 105 (6), 3245-3265.

D'Spain, G. L. and Kuperman, W. A. (1999). "Application of waveguide invariants to analysis of spectrograms from shallow water environments that vary in range and azimuth", J. Acoust. Soc. Am. 106 (5), 2454-2468.

Thode, A. M., Kuperman, W. A., D'Spain, G. L., and Hodgkiss, W. S. (2000). "Localization using Bartlett matched-field processor sidelobes," J. Acoust. Soc. Am. 107 (1), 278-286.

Thode, A. M., D'Spain, G. L., and Kuperman, W. A. (2000). "Matched-field processing, geoacoustic inversion, and source signature recovery of blue whale vocalizations," J. Acoust. Soc. Am. 107 (3), 1286-1300.

D'Spain, G. L., Berger, L. P., Kuperman, W. A., Stevens, J. L., and Baker, G. E. (2001). "Normal mode composition of earthquake T phases," Special issue on Hydroacoustics of the CTBT in Pure and Appl. Geophys. 158 (3), 475-512.

Stevens, J. L., Baker, G. E., Cook, R. W., D'Spain, G. L., Berger, L. P., and Day, S. M. (2001). "Empirical and numerical modeling of T-phase propagation from ocean to land," Special Issue on Hydroacoustics of the CTBT in Pure and Appl. Geophys. 158 (3), 531-565.

D'Spain, G. L., (1997). "Summer night sounds by fish in shallow water," Shallow-Water Acoustics/Collection of 100 Papers Presented at the 1997 International Conference on Shallow-Water Acoustics (SWAC '97), April 21-25, 1997, Beijing, China,: R. Chang and J. Chou, Eds., Beijing, China, China Ocean Press, 379-384.

Booth, N. O., Baxley, P. A., Rice, J. A., Schey, P. W., Hodgkiss, W. S., D'Spain, G. L., and Murray, J. J. (1996). "Source localization with broad-band matched-field processing in shallow water," IEEE J. Ocean. Engin., Vol 21 (4), pp. 402-412.

Hodgkiss, W. S., Ensberg, D. E., Murray, J. J., D'Spain, G. L., Booth, N. O., and Schey, P. W. (1996). "Direct measurement and matched-field inversion approaches to array shape estimation," IEEE J. Ocean. Engin., Vol 21 (4), pp. 393-401.

Harris, D. B., D'Spain, G. L., and Goldner, A. (1994). "Regional observation of a nuclear test from a vertical hydrophone array," Seismol. Soc. Am. Bull., Vol. 84 (4), pp. 1148-1153.

D'Spain, G. L., Hodgkiss, W. S., and Edmonds, G. L. (1991). "Energetics of the deep ocean's infrasonic sound field," J. Acoust. Soc. Am.,Vol. 89 (3), pp. 1134-1158.

D'Spain, G. L., Hodgkiss, W. S., and Edmonds, G. L. (1991). "The simultaneous measurement of infrasonic acoustic particle velocity and acoustic pressure in the ocean by freely drifting Swallow floats," IEEE J. Oceanic Eng., Vol. 16 (2), pp. 195-207.

D'Spain, G. L. (1990). "The energetics of the ocean's infrasonic sound field," Ph.D. thesis, University of California, San Diego.