SAES latest researches on underwater noise by ships are presented at Tecniacústica

Three of the studies are focused on the search for a function that allows to estimate the noise radiated to the sea by ships as a consequence of the vibrations existing in the ship hull. The other study analyzes the acoustic and non-acoustic underwater pollution produced by ships and other types of human activities on sea.

SAES_Tecniacústica_2018The studies have been presented at the 49th Spanish Acoustic Technician Congress in Cádiz, which was held simultaneously with Expoacoustic’18. SAES shown their products and services at the exhibition as the only reference in underwater acoustics in Spain.

Collaboration between SAES and the University of Alicante.

 The previously referred studies has been carried out between SAES and  the University of Alicante and they were presented from 23th October to 25th.

First day the studies entitled “Vibroacoustic behavior of cylindrical containers in air” (16:50 h. ROOM 3) and “Vibroacoustic behavior of cylindrical containers in water” (Day 24. 17:10 h) were defended by Francisco Javier Rodrigo Saura, SAES specialist in signal analysis and processing, and also by the scientists of the University of Alicante Pedro Poveda Martínez, Jesús Carbajo San Martín, José M. Requena Plens and Jaime Ramis Soriano. In these works it was described the experimental procedure carried out to study the radiant behavior (in air and in water) of a semi-cylinder shape  structure made of several materials. The  level of vibration and sound pressure of the shapes were evaluated in a plane close to the source. These studies are necessary to extrapolate them to more complex geometries and thus be able to determine a relationship that allows to predict the noise radiated to the sea by a vessel as a consequence of the vibrations in the hull. This issue is studied more closely in the study “Quantification of acoustic noise radiated by ships through its hull” which was exposed on Day 26 at 9.30 in room 4.

On the other hand, on day 25 at 17.10 also in room 4 was be shown the paper “Analysis of pollution of acoustic and non-acoustic origin in marine environments” written by SAES engineers Esther Moya de Rivas, Francisco Javier Rodrigo Saura and Antonio Sánchez García.

This study deepens in the evaluation of the acoustic and non-acoustic underwater pollution, estimating the environmental impact at sea. In addition, real values are presented for the quantification of pollution due to the radiated energy. The measures were obtained  in situ by MIRS system in campaigns of long duration.

The MIRS is the system used to measure the emissions of vessels.

 The SAES Multi Influence Range System (MIRS) for surface vessels and submarines provides real influence measures (magnetic, electric, pressure, acoustic, and seismic) in a real and controlled scenario, to successfully counter related threats. MIRS is among the best systems in the world in its class and compared to fixed stations. A decisive advantage of the MIRS system is that, due to its portability, low weight, low power consumption and high performance, can obtain all signatures of the ship in different geographical locations.

MIRS is also a tool for testing and calibration of:

  • Systems developed to reduce those influences as degaussing systems, ASG, etc.
  • Systems developed for MCM as the mine sweeping systems.

MIRS has been primarily designed using Commercial Off The Self (COTS) components for maximum reliability at minimum cost

 

 

 

SAES at Global SOF Symposium and ADEX 2018

SAES has participated, from September 25th to 27th, in two international exhibitions: Global SOF Symposium, the international conference specializing in Special Forces, which took place in Madrid, and ADEX (Azerbaijan International Defense Exhibition, for its acronym in English ) that was held in Baku.

At SOF, the company focused on the underwater demolition charge MILA and the Diver Detection Sonar DDS-03 systems. Both products were special interesting for a number of representatives of the Special Forces attending the conference. Specifically, SAES was visited by both the Major General and the Commander of the MCOE (Joint Special Operations Command) and the Nato SOF HeadQuarters Commander. Also representatives from foreign countries such as Sweden and Ukrained visited the stand.

DDS-03 can detect divers or other underwater intrusions, like underwater vehicles.These types of underwater threats can be easily circumvented. The solution is to incorporate diver detection sonar into the surveillance system of those military and commercial ports, power stations or petrochemical plants, oil platforms, anchored ships and other high-value assets with access to water mass.

MILA MILA is an underwater demolition charge that incorporates a computer-controlled detonation system. It is used by combat divers in covert underwater operations to neutralize threats.

 

SOF_2018_DDS-03 SAES_SOF-2018

At the Azerbaijan exhibition, ADEX 2018, SAES presented, besides the previously said DDS-03 and MILA, the product line focused on MCM warfare: the MINEA naval mines and MIRS Multi-influence Range Systems.

MINEA naval mines are the most advanced smart marine mines manufactured today. They are intended for training minesweeper crews. Knowing how an advanced smart mine works is essential to the safety of the vessel.

The Multi Influence Range System (MIRS) for surface vessels and submarines provides, simultaneously, real measurements of following influences: magnetic, electric, pressure, acoustic, and seismic.

SAES team met to naval officer and representatives from countries in the Caspian region such as Russia, Kazakhstan, Azerbaijan and of Saudi Arabia, the United States, Malaysia, Egypt and France.

 

SAES-ADEX-2018-Mines SAES_ADEX_ 2018

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