![](https://cyprus-subsea.com/wp-content/uploads/2022/04/Photo-of-Glider-in-water-edited.jpg)
A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sounds. Since sound travels 4.3 times faster in water than in air, a sound wave in water exerts a pressure 60 times that exerted by a wave of the same amplitude in air. In addition, multiple hydrophones arranged in an array facilitates localizing and
tracking sound sources underwater.
The Four-Channel Hydrophone Array is an acoustic system consisting of four small hydrophone elements integrated on a Seaglider and a four channel recorder inside a pressure housing. The array consists of 2 hydrophone elements on the wings, an element on the nose, and an element next to the glider’s antenna. The pressure housing fits inside the wet payload compartment of the Seaglider.
![](https://cyprus-subsea.com/wp-content/uploads/2022/04/Recorder-Pressure-Housing-in-Wet-Payload-768x1024.jpg)
Key Specifications of Four-Channel Hydrophone Array
- Linear Range: 1Hz to 100kHz ± 2 dB
- Receiving Sensitivity: -208dBV re 1 μPa (40μV / Pascal)
- Hydrophone Element Size: 12mm x 40mm (D x L)
- System Max Depth: 300m
- Overall Power: 2W
The system is currently capable of recording 128GB of acoustic data. Expansion of a few terabytes coming soon.