Separating underwater ambient noise from flow noise recorded on stereo acoustic tags attached to marine mammals. von Benda-Beckmann, A. M., Wensveen, P. J., Samara, F. I., Beerens, S. P., & Miller, P. J. O. Journal of Experimental Biology, 2016.
Separating underwater ambient noise from flow noise recorded on stereo acoustic tags attached to marine mammals [link]Paper  doi  abstract   bibtex   
Sound recording acoustic tags attached to marine animals are commonly used in behavioural studies. Measuring ambient noise is of interest to understand responses of marine mammals to anthropogenic underwater sound, or to assess their communication space. Noise of water flowing around the tag reflects the speed of the animal, but hinders ambient noise measurement. Here we describe a correlation-based method for stereo acoustic tags to separate the relative contributions of flow and ambient noise. The uncorrelated part of the noise measured in DTAG recordings related well to animal swim speed of a humpback whale (Megaptera novaeangliae), thus providing a robust measure of flow noise over a wide frequency bandwidth. By removing measurements affected by flow noise, consistent ambient noise estimates were made for two killer whales (Orcinus orca) with DTAGs attached simultaneously. The method is applicable to any multi-channel acoustic tag, enabling application to a wide range of marine species.
@Article{Benda-Beckmann2016,
  author    = {von Benda-Beckmann, Alexander M. and Wensveen, Paul J. and Samara, Filipa I.P. and Beerens, S. Peter and Miller, Patrick J. O.},
  title     = {Separating underwater ambient noise from flow noise recorded on stereo acoustic tags attached to marine mammals},
  year      = {2016},
  doi       = {10.1242/jeb.133116},
  eprint    = {http://jeb.biologists.org/content/early/2016/05/25/jeb.133116.full.pdf},
  url       = {http://jeb.biologists.org/content/early/2016/05/25/jeb.133116},
  abstract  = {Sound recording acoustic tags attached to marine animals are commonly used in behavioural studies. Measuring ambient noise is of interest to understand responses of marine mammals to anthropogenic underwater sound, or to assess their communication space. Noise of water flowing around the tag reflects the speed of the animal, but hinders ambient noise measurement. Here we describe a correlation-based method for stereo acoustic tags to separate the relative contributions of flow and ambient noise. The uncorrelated part of the noise measured in DTAG recordings related well to animal swim speed of a humpback whale (Megaptera novaeangliae), thus providing a robust measure of flow noise over a wide frequency bandwidth. By removing measurements affected by flow noise, consistent ambient noise estimates were made for two killer whales (Orcinus orca) with DTAGs attached simultaneously. The method is applicable to any multi-channel acoustic tag, enabling application to a wide range of marine species.},
  file      = {:vonBendeBeckmann_flownoise_DTAG_2016.pdf:PDF;:vonBendeBeckmann_flownoise_DTAG_2016_ELECSUPP.PDF:PDF},
  journal   = {Journal of Experimental Biology},
  owner     = {Tiago Marques},
  timestamp = {2016.08.23},
}

Downloads: 0