Underwater Sounds – Live stream

Tune in to live recordings of underwater sounds captured by hydrophones nestled on the seabed at Middelfart, Denmark. This marine protected area is a bustling hub for harbour porpoises, and a collaborative effort between Aarhus University, Naturpark Lillebaelt, and Seiche is bringing real-time monitoring of porpoise activity and ambient sound levels.

Our mission? To unravel the mysteries of why this area is pivotal for porpoises, how their activity ebbs and flows over 24-hour cycles and throughout the year, and the impact of human activities on their behaviour. Using cutting-edge software, we remotely access and manage the system online, with audio and visual feeds streamed directly to the Seiche YouTube channel.

The displays vary depending on how researchers are viewing the data: you may see a spectrogram of ambient sounds, or a map with the tracks of larger vessels (AIS reports), or you may see a click detector display, where porpoise clicks are automatically displayed as red triangles. The audio you will hear blends low-frequency background noises with high-frequency porpoise clicks, that have been dropped down into our hearing range by signal processing techniques (the audible output of an envelope detector).

Live Stream – Middlefart, Denmark

Industry Events Calendar

Where can you catch up with the Seiche team across the globe? We have the following events on our schedule for the coming year, with many more to follow – are you attending any of them? If so, we would love to see you!

2025
22 – 23 JanuaryOffshore Wind
29 JanuaryMarine Measurement Forum
8 – 10 AprilWind Europe, Copenhagen
8 – 10 AprilOcean Business, Southampton
21 – 22 MayEAGE/SBGf Workshop
2 – 5 JuneEAGE Workshop, Toulouse
17 – 18 JuneGlobal Offshore Wind
29 June – 4 JulyEffects of noise on aquatic life, Prague