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Underwater and Bioacoustics Instrumentation & Consultation


The RUDAR™  (Remote Underwater Digital Acoustic Recorder) is a very compact, long-term autonomous recording device that is light enough to be deployed by hand from small boats. The RUDAR™  system uses a custom-made version of the new  ST400 SoundScape embedded Linux mobile data recorder. Interchangeable Cetacean Research  C54- or C304- series hydrophones are used for signal detection. This system has very low power consumption that allows extended remote recording sessions and continuous high-speed data acquisition.

Development Background - the idea for a portable remote underwater recording device came about after several conversations in 2000 and 2001 with fisheries biologist Rodney Rountree of the University of Massachusetts at Amherst. The first conceptual RUDAR™  prototype was completed in early January 2002 for NOAA and the University of Hawaii's Coral Reef Ecosystem Investigation.

RUDAR™  Features:

  • Maximum working depths of 1500m or 3500m
  • Up to four hydrophone channels sampled with 24-bit resolution
  • Sample rates selectable over wide frequency range
  • Flexible recording scheme programmability
  • Can record using two independent schemes and sample rates simultaneously
  • Data written to hot-pluggable internal hard drives for very long recording times
  • Ultra-fast data transfer for post processing analysis
  • Embedded Linux operating system
  • Light weight for easy deployment from small boats
  • Rugged housing for long life in harsh oceanographic conditions

Please contact us for more information



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