A digital Hydrophone is a passive acoustic sensor (an underwater microphone) that converts sound energy to electrical energy, with a binary stream output. The Broadband Acoustic Receiver (Hydrophone) listens for earthquakes, sea creatures, and human-generated noise in the ocean, and can hear and record everything from marine mammals in the water column to rain at the surface. The OOI requirements specified very broadband hydrophones with good noise floor characteristics and a wide dynamic range.

(text and images courtesy of Interactive Oceans)

Data Products

This instrument measures the following data products. Select a data product's name to learn more.

Data Product Code DPS
Broadband Acoustic pressure waves HYDAPBB
Broadband Frequency HYDFRBB

The algorithm code used to generate data products for this instrument is also available in the ion-functions GitHub repository.

Instrument Models & Deployed Locations

The OOI includes the following instrument makes and models for this instrument type. Follow the links below to find out where in the OOI this instrument has been deployed. You'll also find quick links for each instrument to Data portal, where you can plot and access data.

Class-Series Make Model
HYDBBA Ocean Sonics icListen HF

Primary Science Discipline


Research Themes

Access Data

HYDBB on the Data Portal

A hydrophone mast being lifted into position atop a junction box at the Slope Base site. Photo credit: NSF-OOI/UW/CSSF; Dive R1735; V14. Creative Commons License
The ROV ROPOS lifting the protective cap off of an icListen Broadband Hydrophone tripod deployed at the Endurance Offshore location (600m). Photo credit: NSF-OOI/UW/CSSF; Dive R1747; V14.Creative Commons License