Hydrophones
Ocean Sonics Hydrophones
Ocean Sonics instruments produce high quality recordings, and are designed to be simpler to use than traditional analog hydrophones. Ocean Sonics hydrophones include high Frequency (10 to 200, 000 Hz) and low Frequency (0.1 to 1600 Hz) models. These hydrophones process data while it is being collected and produce calibrated waveforms. Ocean Sonics hydrophones in titanium housings can be deployed to 3500m depth.
Naxys Hydrophones
The Naxys hydrophone sensor element is encased within an acoustically transparent compound, allowing omni-directional detection of audio signals at frequency ranges between 5Hz and300kHz. Signals are processed in 16-bit resolution. These instruments are pressure-rated to 3000m.
Hydrophones at Folger Deep
Hydrophone data collected from Folger deep and Barkley Canyon are used to monitor whale populations. The hydrophones are able to detect vocalizations used to study the season shifts in cetacean populations. Whale songs are detectable from 10s to 100s of kilometers away from the source. Species (such as orcas) and sub-populations (such as resident, transient or offshore orcas) are identifed by their unique calls. (NEPTUNE Canada: An Invitation to Science).
Listen to the Deep (LIDO)
Acoustic readings from hydrophones at Barkley Canyon and Folger Passage have been analyzed and incorperated into the Listen to the Deep website. The 'LIDO' website was developped by researchers at Spain's Technical University of Catalonia and analyzes hydrophone data from many networks around the world. The LIDO research aims to understand organisms responses to anthropogenic sound sources and informs on long-term management of noise pollution in the oceans (NEPTUNE Canada: An Invitation to Science, 2012).
Hydrophones on the Seafloor
Naxys hydrophones have been deployed in the NEPTUNE Regional Network at Folger Deep, Barkley Canyon and the Vertical Profiler System. There are future plans to install hydrophones at Endeavour Mothra, and ODP 1027.
Currently, there are several Ocean Sonics Hydrophones installed on the NEPTUNE Regional Network at Folger Deep, Barkley Canyon, Endeavour (Mothra), and ODP 1027.
Barkley Canyon
Barkley Canyon Vertical Profiler System (VPS)
Naxys Ethernet Hydrophone 02345 Ti 052 at Barkley Upper Slope