Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page

Geoacoustic characterization of Stone Age cultural layers: preliminary FE modelling
Hermand, J.-P.; Tayong, R. (2013). Geoacoustic characterization of Stone Age cultural layers: preliminary FE modelling, in: IEEE OCEANS 2013 Norway. Proceedings of a meeting held 10-14 June 2013, Bergen, Norway. Oceans (New York), CFP13OCF: pp. 6. https://dx.doi.org/10.1109/OCEANS-Bergen.2013.6608184
In: IEEE (2013). OCEANS 2013 Norway. Proceedings of a meeting held 10-14 June 2013, Bergen, Norway. Oceans (New York), CFP13OCF. IEEE: New York. ISBN 978-1-479-90002-2. 1646 (2 Vols) pp., more
In: Oceans (New York). IEEE: New York. ISSN 0197-7385, more
Peer reviewed article  

Available in  Authors 
Document type: Conference paper

Keyword
    Marine/Coastal

Authors  Top 

Abstract
    The use of acoustic. methods to detect and nap submerged Stone Age sites is of great importance for both the archaeological and underwater acoustics research. This paper presents a preliminary numerical study for the geoacoustic characterization of Stone Age cultural layers. Finite element modelling tools are used to investigate the feasibility of detecting acoustically a submerged flint. The acoustic response of a flint buried in soft sediment is simulated. A realistic condition of the flint submerged in a cultural layer surrounded by seawater, sand, mud and a substrate layer of Moraine is also presented. A theoretical calculation of flint resonance frequencies shows that depending on their characteristics, they can produce a wide range of frequencies beyond 2 kHz as it has been observed experimentally. In this study, a Ricker wavelet source is used to estimate the total and scattered pressure fields due to a flint sample. Simulation of the wave propagation accounts for the variation of the compressional and shear speeds of sound. To detect the submerged flint, the source contains the determined fundamental resonance obtained at 10.6 kHz. Snapshots for different views around the flint are analyzed to detect the effect of the flint sample. A sharp peak is noticed to appear at the given resonance of about 18% the emitting signal for the flint buried inside 5 cm of a cultural layer environment. The case of the flint buried in 15 cm of cultural layer overlying and 100 cm of sand is also computed and presented. This first step modelling indicates that acoustic probing may detect and localize worked flints buried inside soft sediment environment. The other results obtained are analyzed and discussed. The study support the development of a geoacoustic inverse method to characterize submerged flints cores and blades but also the accumulation of flakes.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors