GeoSpectrum produces a wide variety of hydrophones that can be used for a number of applications including marine mammal detection, monitoring blow-out preventers, and subsea construction.

The M509 Hydrus Towed Array is a thin line digital array. The array streams digitized acoustic and non-acoustic sensor data. Hydrus is a low noise, low drag, low power and lightweight array making it ideal for towing from an unmanned vehicle. The Hydrus array can also be customized with greater than 64 channels. The array and tow cable are neutrally buoyant to support low speed tow. Hydrus includes acceleration cancelling hydrophones to minimize mechanical noise. The array is user configurable to less than 2.5 kHz sampling rate, and high/low acoustic channel gain to tailor performance to various applications. Non-acoustic sensors include depth, temperature, roll, pitch, and yaw.

Applications vary from marine surveillance, marine monitoring, anthropogenic noise monitoring, and detection applications.

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The M20 is an excellent choice for applications benefiting from direct measurement of particle motion. GeoSpectrum’s particle motion sensors are suitable for a variety of different applications including marine mammal detection, ocean environmental monitoring, antisubmarine warfare (ASW), marine surveillance, offshore oil and gas monitoring, and offshore wind farm monitoring.

The M20 family is a group of sensors that measure particle motion with high sensitivity and good directivity down to very low frequencies.

GeoSpectrum’s particle motion sensors are accelerometer-based and are used to measure 2D or 3D particle motion or as a low-frequency directional hydrophone in a broad range of environments—from within 1 m of an air gun to quiet ocean environments.

Because the sensor maintains good directivity to very low frequencies, it also supports acoustic applications requiring good low-frequency bearing detection in a very small package.

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C-BASS is a novel family of very low frequency (VLF) electrodynamic sound projectors. These powerful electrodynamic projectors are less expensive, lighter, smaller, more efficient, and have a broader bandwidth than their peers. C-BASS makes possible applications that were previously impractical.

GeoSpectrum offers a wide range of standard C-BASS configurations with operating frequencies ranging from below 10 Hz up to 3 kHz and maximum source levels that exceed 200 dB re 1 µPa @ 1m. Our finite element analysis and modeling tools and significant build experience enable us to customize C-Bass designs to customer specifications. The omni-directional C-BASS can be used individually or in arrays to produce high-power sources with or without directivity.

C-BASS are offered as stand-alone transducers for customer integration or as a GeoSpectrum-provided system that can include VLF amplifiers, pressure compensation, signal controllers, tow bodies, deployment cables, and winch systems.

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