Posted by: Team - Bowhead whale | March 8, 2015

Playback experiments

We have started our other objective of this field trip, which is the playback experiment.

We have now performed 2 days of playback experiments and everything went really well and as planned (not like in Qaqqaliaq..).

The first day of the experiment was quite cold.

Outi sitting on the control station, the position used for acoustic recordings prior, during and after the playback sound emission. Photo: J. Jakobsen.

Outi sitting on the control station, the position used for acoustic recordings prior, during and after the playback sound emission. Photo: J. Jakobsen.

Outi, John and Laia went out of Qeqqertarsuaq, towards the west sea-ice nearby with the snow mobile and all the necessary equipment (underwater speaker, 3 tuks, rope, hydrophone, recording devices, walkie-talkies, etc). We re-used a hole in the ice that was already made by Fin and John on another day for shark fishing. We introduced the loudspeaker into the water through the ”shark” hole in the ice and started emiting our playback sound sequence (which has been specially designed for this experiment).

Another hole was made in the ice to deploy a hydrophone in order to make acoustic recordings prior, during and after the playback sound emission.

Laia at the Playback station, the position where we deployed the loadspeaker and emitted the playback sounds. Photo: J. Jakobsen.

Laia at the Playback station, the position where we deployed the loadspeaker and emitted the playback sounds. Photo: J. Jakobsen.

Outi and Laia at the "shark hole" used for the playback experiments. Photo: J. Jakobsen.

Outi and Laia at the “shark hole” used for the playback experiments. Photo: J. Jakobsen.

The second day of the experiment was luckily a very sunny and beautiful day with an amazing sunlight.

Outi, John and Laia went to the same place as we did the 1st day of playback experiments and followed the same procedure just with the slide change of deploying the hydrophone 200 meters further than 1st day and therefore having to break throught the ice with the tuk to make a new hole.

Outi at the recording station, listening and enjoying the sunny day. Photo: J. Jakobsen.

Outi at the recording station, listening and enjoying the sunny day. Photo: J. Jakobsen.

Laia setting the acoustic emission equipment at the "shark hole" (Playback station). Photo: J. Jakobsen.

Laia setting the acoustic emission equipment at the “shark hole” (Playback station). Photo: J. Jakobsen.


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