SEISMIC WAVES COUPLED TO SONIC BOOMS

Geophysics ◽  
1962 ◽  
Vol 27 (4) ◽  
pp. 528-530 ◽  
Author(s):  
Jack Oliver ◽  
Bryan Isacks
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Seismic Waves ◽  
Low Frequencies ◽  
Sonic Booms ◽  
Sea Floor

Air‐coupled seismic waves of low frequencies were excited by aircraft‐generated sonic booms and detected by a hydrophone at moderate depth and a geophone on the sea floor. The experiments were conducted on the continental shelf off New Jersey.

Sea floor characterization offshore of the New York-New Jersey metropolitan area using sidescan sonar

2000 ◽  
Author(s):  
William C. Schwab ◽  
J.F. Denny ◽  
Bradford Butman ◽  
W.W. Danforth ◽  
D.S. Foster ◽  
...  
Keyword(s):  
New York ◽  
New Jersey ◽  
Metropolitan Area ◽  
Sidescan Sonar ◽  
Sea Floor

Diving behaviour of two Ross seals off east Antarctica

2005 ◽  
Vol 32 (1) ◽  
pp. 63 ◽  
Author(s):  
Colin Southwell
Keyword(s):  
Continental Shelf ◽  
Additional Data ◽  
Prey Species ◽  
Current Knowledge ◽  
East Antarctica ◽  
Maximum Depth ◽  
Diving Behaviour ◽  
Sea Floor ◽  
Transmission Period ◽  
The Antarctic

The Ross seal (Ommatophoca rossii) is the least frequently sighted and least known of the Antarctic pinnipeds. Current knowledge of foraging and diving behaviour is based on observations of a single seal over <2 days. The current study provides some additional data on the diving behaviour of two Ross seals off east Antarctica over periods of 31 and 12 days during December–January 1999–2000 using satellite-linked dive recorders. Both seals remained over the continental shelf for these times, the female remaining some distance from the coast and the male moving close to the coast approximately half-way through his transmission period. Most dives by the female reached depths >150 m (maximum depth 372 m) and the modal duration was 10–11 min. The male’s dives were slightly shallower (most >100 m) and shorter (mode 6–7 min) when distant from the continental coast, and were truncated to a depth of 180 m when close to the coast, presumably by the sea floor. These dive patterns suggest that their prey species, thought to comprise mostly fish and squid, were relatively unavailable at depths <100 m.

Deep-Ocean Exploitation Technology

1971 ◽  
Vol 8 (02) ◽  
pp. 145-158
Author(s):  
Raymond Kaufman
Keyword(s):  
Continental Shelf ◽  
Large Scale ◽  
Deep Ocean ◽  
Abandoned Mine ◽  
Economic Potential ◽  
Mining Method ◽  
Mine Shaft ◽  
Sea Floor ◽  
Ocean Mining ◽  
Air Lift

The paper discusses the latest techniques proposed for mining minerals from the deep ocean. Deep ocean is defined as the sea beyond the continental shelf, particularly areas of the sea floor exceeding 1200 ft in depth. The three principal deep-ocean minerals having economic potential in the immediate future are identified. Four recently proposed advanced deep-ocean mining concepts are presented. Use of the air-lift pump as a viable mining method is discussed and a large-scale air-lift pump experiment conducted in an abandoned mine shaft at Galax, Virginia is described. The principal features of the conversion of a small C1-M-AV1 type cargo ship to a deep-ocean mining prototype vessel, RV Deepsea Miner, is outlined.

The State of Florida Paleoindian Studies Early Paleoindian Potentials on the Continental Shelf

2019 ◽  
pp. 276-282
Author(s):  
Ervan G. Garrison
Keyword(s):  
Big Data ◽  
Continental Shelf ◽  
Emerging Technologies ◽  
The State ◽  
Western Hemisphere ◽  
Archaeological Sites ◽  
Sea Floor ◽  
Human Colonization ◽  
Underwater Sites

Especially given the debate over the timing and means of prehistoric human colonization of the Western Hemisphere, the search for submerged archaeological sites on the sea floor is critical. This chapter reflects on previous chapters in addressing how future researches might find these underwater sites by using methodologies that are both geologically and anthropologically theoretical, including utilizing big data and emerging technologies to examine the sea floor.

Distribution of modern benthic foraminifers on the New Jersey Outer Continental Shelf

1980 ◽  
Vol 5 ◽  
pp. 43-69 ◽  
Author(s):  
C. Wylie Poag ◽  
Harley J. Knebel ◽  
Ruth Todd
Keyword(s):  
New Jersey ◽  
Continental Shelf ◽  
Outer Continental Shelf ◽  
Benthic Foraminifers

Prediction of High Frequency Sonic Boom Noise Transmission Into Buildings Using a Hybrid Analytical-Ray Tracing Approach

2012 ◽  
Author(s):  
Joseph M. Corcoran ◽  
Marcel C. Remillieux ◽  
Ricardo A. Burdisso
Keyword(s):  
Ray Tracing ◽  
High Frequency ◽  
Acoustic Radiation ◽  
Low Frequency ◽  
Sonic Boom ◽  
Acoustic Transmission ◽  
Frequency Method ◽  
Low Frequencies ◽  
Sonic Booms ◽  
Acoustic Responses

As part of the effort to renew commercial supersonic flight, a predictive numerical tool to compute sonic boom transmission into buildings is under development. Due to the computational limitations of typical numerical methods used at low frequencies (e.g. Finite Element Method), it is necessary to develop a separate approach for the calculation of acoustic transmission and interior radiation at high frequencies. The high frequency approach can then later be combined with a low frequency method to obtain full frequency vibro-acoustic responses of buildings. An analytical method used for the computation of high frequency acoustic transmission through typical building partitions is presented in this paper. Each partition is taken in isolation and assumed to be infinite in dimension. Using the fact that a sonic boom generated far from the structure will approximate plane wave incidence, efficient analytical solutions for the vibration and acoustic radiation of different types of partitions are developed. This is linked to a commercial ray tracing code to compute the high frequency interior acoustic response and for auralization of transmitted sonic booms. Acoustic and vibration results of this high frequency tool are compared to experimental data for a few example cases demonstrating its efficiency and accuracy.

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