New Wave Media

May 15, 2019

Tech Talk: GeoSpectrum Acoustic Solutions

  • 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.
  • A GeoSpectrum Technologies C-BASS VLF sound projector undergoing underwater testing in a land-based test tank. Photo: GeoSpectrum Technologies
  • 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. 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.
  • A GeoSpectrum Technologies C-BASS VLF sound projector undergoing underwater testing in a land-based test tank. Photo: GeoSpectrum Technologies A GeoSpectrum Technologies C-BASS VLF sound projector undergoing underwater testing in a land-based test tank. Photo: GeoSpectrum Technologies

MTR Science & Technology writer Tom Mulligan reports from his subsea and maritime tech tour through eastern Canada.

Dartmouth, Nova Scotia based acoustics specialist 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 monitoring and ocean observation sectors.

Components designed and manufactured by the company are tested with a range of on-site equipment to ensure these meet customer requirements: this equipment includes pressure and environmental chambers and NIST-traceable calibration equipment, and the company has a production facility capable of manufacturing more than 1000 hydrophones a day.

GeoSpectrum’s wide-band omnidirectional hydrophones include an integral, low-noise voltage- or current-signalling preamplifier and can be configured to operate over customer-defined bandwidths with required sensitivity and also allow for customizable gain. In addition, the depth rating for each hydrophone can be tailored to meet specific requirements to meet shallow- to deep-water requirements.

In addition to hydrophones, the company designs and manufactures electrodynamic sound projectors and has recently introduced its C-BASS family of very-low-frequency projectors. These are less expensive and smaller, lighter and designed to be more efficient than standard products. With their broad bandwidth, they can be used in a variety of applications where sound projectors could not previously be employed. The C-BASS systems may be used omni-directionally or in arrays to produce high-power sources with or without directivity and applications include their use as diver deterrents to protect marine assets; as VLF ASW systems; as a VLF calibration source; in AUV-based target emulation; for underwater navigation/GPS applications by providing a network of beacons; for acoustic and health monitoring purposes; and in VLF communication systems with a range exceeding 1,000 km.

Marine Technology Magazine Cover Sep 2019 - Autonomous Vehicle Operations

Marine Technology Reporter is the world's largest audited subsea industry publication serving the offshore energy, subsea defense and scientific communities.

Subscribe
Marine Technology ENews subscription

Marine Technology ENews is the subsea industry's largest circulation and most authoritative ENews Service, delivered to your Email three times per week

Subscribe for MTR E-news