Acoustic Systems News

Figure 6: A DOLPHIN Sonar trial result, SAS at three times Nyquist speed. Image: QinetiQ North America

DOLPHIN: Enabling Technology for Acoustic Systems

DOLPHIN Signal Processing TechnologyAcoustics enable many core undersea capabilities. Where radio waves do not propagate well, and light is absorbed quickly, acoustic signals help us map, see, locate and communicate. The many products and technologies that employ acoustics all depend upon signal processing, thus new processing approaches can impact many applications.  QinetiQ North America (QNA) and its partner Optimal Systems Laboratory (OSL) have developed DOLPHIN - a patented method using analog cancellation that eliminates receiver saturation and enables simultaneous transmit and receive.

Deployment of a C-BASS VLF sound projector: a recent product launch from GeoSpectrum Technologies that fulfils a range of operational roles for the marine sector. Photo: GeoSpectrum Technologies.

Tech Talk: GeoSpectrum Acoustic Solutions

company GeoSpectrum Technologies Inc, a producer of underwater acoustic transducers and systems, has been in operation for more than 20 years, supplying hydrophones and sound projectors to a range of customers in the marine and oceanography sectors, as well as providing consultancy services on acoustic systems integration and test procedures. End-user sectors include defense and homeland security, oil & gas, and environmental services. As well as standard products, GeoSpectrum can also provide customized products and is particularly recognized as a leading provider of systems for the marine mammal

Sonarydne’s BlueComm depressor in the water at Aldabra, during the Nekton First Descent mission. Photo: Nekton Oxford Deep Ocean Research Institute

Unheard Underwater: Covert Communications

use of acoustics is prevalent when communicating wirelessly underwater and it is likely to remain so. The physics of how sound propagates in water are well understood. Instruments to both communicate with and track other acoustic beacons are common. In fact, low and medium frequency acoustic systems can be used to communicate effectively subsea over vast ranges. Sonardyne recently demonstrated data rates of up to 3000bps over an 11km range. However, the same reasons which make sound such an effective means for carrying data through the water also make it susceptible to interference and

Export Licensing: Tips U.S. Exporters Shouldn’t Overlook

Commerce Control List (CCL) include not only complete systems and key parts and components, but also raw materials, production equipment, and other related items. For marine technology exporters, key entries can be found in USML categories VI (surface vessels of war), XI (underwater electronics and acoustic systems), XII (optical and inertial sensors) and XX (submersible vessels); and CCL categories 5 (telecommunications), 6 (acoustic sensors), 7 (inertial sensors and navigation), and 8 (marine). • Different levels of technology can affect where you can export. The level of a product&rsquo

Nautilus AUV ready for action (Image: UFRJ Nautilus)

UFRJ Nautilus: A Brazilian AUV Project

.“Outside the university, we have secured the support of another government organization, which has been extremely productive and beneficial,” Armand said. “Since 2016, the Navy Research Institute (IPqM) has supported us in the development of our software. Our work with the Acoustic Systems Group has developed the algorithms for the acoustic signal processing, implementing the beam forming algorithm for our AUV to find pings in the competition. This experience provided an unparalleled learning experience, because the institution is a reference in the sonar field. IPqM also provided

Sonardyne 6G Wideband Acoustics allows simultaneous operations by  multiple platforms. (Courtesy Sonardyne International)

Digital Ocean: Making Subsea Data More Easily Accessible

to a wider variety of different application areas, including ocean science, exploration, aquaculture and other similar markets.   Technology Platforms – Acoustics Sonardyne has developed an industry-leading wideband digital communications platform upon which most of the company’s acoustic systems are based which is now in its sixth generation (6G). The ‘pin-up’ product for this technology is the Computing and Telemetering Transponder (Compatt 6), a highly adaptable and configurable instrument that is used in a wide range of applications. It is made up of an acoustic transducer

Argentina’s new oceanographic and fishing research vessel 52m Victor Angelescu (Photo: Kongsberg)

Kongsberg Installs Marine Ecosystem Assessment Solution on Research Ship

and integrated the majority of the electronic systems aboard the new ship based on its strategic portfolio of ‘integrated systems for research vessels'. The company is experiencing significant growth in this area due to the efficiencies and increased performance achieved by integrating acoustic systems, bridge and automation system and related vessel operational technology. According to Adrian Madirolas, Head of the Hydroacoustic Lab at INIDEP, sea trials have already shown the high performance of Kongsberg’s integrated systems: “During the sea trials, the hydroacoustic results

INIDEP vessel (Credit Astilleros Armon Vigo SA)

Marine Ecosystem Assessment Solution for Research Ship

at Spanish yard Astilleros Armon Vigo SA and due for delivery mid-2017, the new 52m research ship will be built as a silent vessel, which combined with the advanced Simrad marine ecosystem package will enable highly accurate survey results for Argentinian scientists. The combination of acoustic systems chosen by INIDEP is particularly suited to provide for understanding of the entire marine ecosystem. The equipment scope of supply includes: EK80 scientific wideband system, ME70 scientific multibeam system, a dedicated Bathymetric option for habitat mapping, SX90 Omnidirectional sonar for long-range

Emily MacPherson (Photo: MetOcean)

MTR100: MetOcean Data Systems

industry for over 30 years as a developer and manufacturer of data acquisition and telemetry systems. MetOcean, an ISO 9001 registered company, specializes in the production of air-deployed and ship-deployed drifting buoys, search and rescue buoys, oil spill tracking buoys, ice platforms and acoustic systems and defense and security systems. The company’s head office is located in Dartmouth, Nova Scotia, Canada. The proximity of its facility to the Atlantic Ocean is of prime importance to its operations. Both the Bedford Basin at the head of Halifax Harbor, and the nearby open ocean provide

(Image: Falmouth Scientific)

MTR100: Falmouth Scientific, Inc

;   Physical ocean sensors include the PLUS Family of reliable and rugged current, wave and tide instruments. On-site resources include the acoustic, environmental, and electronic equipment required for the design, development, production and testing of oceanographic sensors and underwater acoustic systems.    Email: fsi@falmouth.com www.falmouth.com     (As published in the July/August 2016 MTR100 edition of Marine Technology Reporter

Image: INNOMAR Technologie

MTR100: INNOMAR Technologie

INNOMAR Technologie GmbH has been in the business of developing and manufacturing efficient underwater acoustic systems for about 20 years. Having sold some 300 sold systems, INNOMAR claims a place as a market leader in parametric sub-bottom profilers. INNOMAR mainly develops and manufactures high-resolution parametric sub-bottom profilers. This technology provides sub-bottom data at excellent vertical and horizontal resolution for various applications like geological surveys, burial-of-depth surveys for buried pipelines or cables or UXO surveys at offshore construction sites. The company’s

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