Live Audio


Latest Recordings

You can listen to audio recordings and view spectrograms from our active hydrophones in the locations shown on the map at right.

How to Listen

  • Press a play button to listen. You may need headphones to hear the audio clearly.
  • Click on a location to go to its live audio page, which includes more details about the instrument and location.
  • Once the audio has loaded into the player, you can drag the circular button to jump forward/backward in the audio file.

Is it Silent?

Hydrophone recordings are not continually available because they may sometimes contain sensitive data with national security implications. We provide Canadian Forces access to our hydrophone streams, and they are occasionally diverted for their use. Recordings that are deemed low risk are then returned to our archives at a later time, generally within 30 days.

Getting Hydrophone Data

You can download hydrophone recordings from our data archives using the Data Search tool (instructions on how to use Data Search). From Data Search, choose Filter by > Audio, then pick a specific location and time period. Note: Hydrophone recording files are quite large, and can take some time to download.

About Hydrophone Data

Ocean Networks Canada operates a variety of instruments associated with acoustics. Some are active, in that they transmit and receive signals to probe the ocean, while others are passive and listen to the sounds in the ocean. Hydrophones and hydrophone arrays are passive listening devices, that have one or several sensing elements, or hydrophones, connected to a central processing unit for analog to digital conversion. A hydrophone is similar to a microphone, but is designed specifically to work underwater. Unlike light, sound propagates efficiently in the ocean, and sounds can often be heard many kilometers from their source.