Design and benchmark tests of a hydrophone array system for whale echolocation recordings
(2012) In Open Journal of Acoustics 2(3). p.121-130- Abstract
- This paper describes in depth the design and application considerations of a computer based measurement system enabling 1 MS/s simultaneous sampling of 47 hydrophones for cross sectional recordings of echolocation beams of toothed whales (Odontocetes). An earlier prototype version of the system has previously only been presented as a brief proof of principle that did not offer a complete description of the software and hardware solution. Crucial hardware and software design considerations of the further developed system include the re-arm times of the burst mode sampling and the dual-core distributed execution of the software components. The rearm time was measured to 283 µs, using a 550 µs long sample window around each click. This... (More)
- This paper describes in depth the design and application considerations of a computer based measurement system enabling 1 MS/s simultaneous sampling of 47 hydrophones for cross sectional recordings of echolocation beams of toothed whales (Odontocetes). An earlier prototype version of the system has previously only been presented as a brief proof of principle that did not offer a complete description of the software and hardware solution. Crucial hardware and software design considerations of the further developed system include the re-arm times of the burst mode sampling and the dual-core distributed execution of the software components. The rearm time was measured to 283 µs, using a 550 µs long sample window around each click. This enables burst mode sampling of clicks with an inter-click interval as short as 833 µs. It is shown through both synthetic benchmark tests of the system and through field measurements of bottlenose dolphins (Tursiops truncatus) and a beluga whale (Delphinapterus leucas) that it is capable of acquiring, analyzing and visualizing data in run-time. It operates effectively also in highly reverberant surroundings like concrete pools and shallow waters. Burst mode sampling allows the system to block reflections with 0.3 - 0.5 m longer propagation paths than the direct path. It is suggested that the system’s compliance to reverberant recording sites makes it valuable in future dolphin echolocation studies. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/96d06d3f-fc38-4d82-b8db-b2aa0e1c278f
- author
- Starkhammar, Josefin LU ; Amundin, Mats ; Nilsson, Johan LU ; Jansson, Tomas LU ; Almqvist, Monica LU and Persson, Hans W LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Open Journal of Acoustics
- volume
- 2
- issue
- 3
- pages
- 121 - 130
- publisher
- Scientific Research Publishing (SCIRP)
- ISSN
- 2162-5794
- DOI
- 10.4236/oja.2012.23014
- language
- English
- LU publication?
- yes
- id
- 96d06d3f-fc38-4d82-b8db-b2aa0e1c278f
- alternative location
- http://file.scirp.org/Html/4-1610028_22596.htm
- date added to LUP
- 2017-05-18 14:53:10
- date last changed
- 2024-08-28 14:48:10
@article{96d06d3f-fc38-4d82-b8db-b2aa0e1c278f, abstract = {{This paper describes in depth the design and application considerations of a computer based measurement system enabling 1 MS/s simultaneous sampling of 47 hydrophones for cross sectional recordings of echolocation beams of toothed whales (Odontocetes). An earlier prototype version of the system has previously only been presented as a brief proof of principle that did not offer a complete description of the software and hardware solution. Crucial hardware and software design considerations of the further developed system include the re-arm times of the burst mode sampling and the dual-core distributed execution of the software components. The rearm time was measured to 283 µs, using a 550 µs long sample window around each click. This enables burst mode sampling of clicks with an inter-click interval as short as 833 µs. It is shown through both synthetic benchmark tests of the system and through field measurements of bottlenose dolphins (Tursiops truncatus) and a beluga whale (Delphinapterus leucas) that it is capable of acquiring, analyzing and visualizing data in run-time. It operates effectively also in highly reverberant surroundings like concrete pools and shallow waters. Burst mode sampling allows the system to block reflections with 0.3 - 0.5 m longer propagation paths than the direct path. It is suggested that the system’s compliance to reverberant recording sites makes it valuable in future dolphin echolocation studies.}}, author = {{Starkhammar, Josefin and Amundin, Mats and Nilsson, Johan and Jansson, Tomas and Almqvist, Monica and Persson, Hans W}}, issn = {{2162-5794}}, language = {{eng}}, number = {{3}}, pages = {{121--130}}, publisher = {{Scientific Research Publishing (SCIRP)}}, series = {{Open Journal of Acoustics}}, title = {{Design and benchmark tests of a hydrophone array system for whale echolocation recordings}}, url = {{http://dx.doi.org/10.4236/oja.2012.23014}}, doi = {{10.4236/oja.2012.23014}}, volume = {{2}}, year = {{2012}}, }