The NEMO-SN1 observatory was deployed and connected in June 2012 using the Cabledtermination of the Catania cabled infrastructure, part of the Western Ionian Sea node of the EMSOResearch Infrastructure. The observatory was equipped with several probes and sensors acquiredon-line from shore. A SMID DT405D hydrophone was installed aboard the NEMO-SN1 observatoryin the aim of searching for acoustic signals in the frequency range 0.001:1000 Hz. Hydrophone’ssignals, are sent to two different read-out channels with +30dB and +60 dB gain respectively, thusdigitised by a 12 bit ADC at 2000 Hz sampling rate frequency. The low-gain channel data isprimarily used to search for seismic events, the high-gain channel data is used for acousticmonitoring of sea noise and search for biological signals. All data are continuously recorded onshoreand saved in files for off-line analysis. Data has been analysed in collaboration between theEMSO Italia and SMO teams. Thanks to the use of an AIS (Automatic Identification System)antenna installed at the Catania infrastructure, acoustic data were analysed in correlation withship-traffic information. Preliminary results show correlation between sea-noise increase andshipping activities. Clear evidence of the presence of fin whales in the area has been also found.

A multidisciplinary approach in the analysis of the low frequency hydrophone aboard the NEMO-SN1 observatory of EMSO: first results on shipping noise and bioacoustics

BELLIA, Giorgio Concetto;GRASSO, ROSARIA
2013

Abstract

The NEMO-SN1 observatory was deployed and connected in June 2012 using the Cabledtermination of the Catania cabled infrastructure, part of the Western Ionian Sea node of the EMSOResearch Infrastructure. The observatory was equipped with several probes and sensors acquiredon-line from shore. A SMID DT405D hydrophone was installed aboard the NEMO-SN1 observatoryin the aim of searching for acoustic signals in the frequency range 0.001:1000 Hz. Hydrophone’ssignals, are sent to two different read-out channels with +30dB and +60 dB gain respectively, thusdigitised by a 12 bit ADC at 2000 Hz sampling rate frequency. The low-gain channel data isprimarily used to search for seismic events, the high-gain channel data is used for acousticmonitoring of sea noise and search for biological signals. All data are continuously recorded onshoreand saved in files for off-line analysis. Data has been analysed in collaboration between theEMSO Italia and SMO teams. Thanks to the use of an AIS (Automatic Identification System)antenna installed at the Catania infrastructure, acoustic data were analysed in correlation withship-traffic information. Preliminary results show correlation between sea-noise increase andshipping activities. Clear evidence of the presence of fin whales in the area has been also found.
bioacoustic; hydrophone; shipping noise
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/109270
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