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.