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The bioacoustic probe: A general-purpose acoustic recording tag
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2000
Year
EngineeringHydroacousticsAcoustical OceanographyUnderwater AcousticOceanographyBiomedical EngineeringOcean AcousticsBioacoustic ProbeUnderwater Noise MitigationNoiseConstant Acoustic SamplingAcoustic CameraOcean InstrumentationTag TechnologyAcoustic CommunicationsAcoustic PropagationNoise MeasurementMarine WildlifeUltrasoundAcoustic TechnologyBioacousticsOcean AcousticMarine BiologyUnderwater SensingAcoustic Microscopy
Recent research has demonstrated the utility of acoustic recording tags to assess the exposure and response of marine wildlife to sound [e.g., W. C. Burgess et al., Deep-Sea Res., Part II 45, 1327–1351 (1998)]. The experimental nature of these tags, however, has limited their adoption by the wider bioacoustical community. To enable broader use of acoustic recording tag technology, a new general-purpose tag is being developed. Miniaturization to a cylinder approximately 3 cm in diameter by 16 cm in length will allow application with a variety of species and attachment methods. Initial versions of the device will sample acoustics with 16-bit resolution at bandwidths up to 14 kHz, as well as temperature and depth with 12-bit resolution. Longevity will depend on the choice of sampling schedule; constant acoustic sampling at 2 kHz will fill the 288 MB solid-state flash disk in 21 h, but this lifetime can be extended by reducing resolution or by recording only during times of interest. Results from initial test deployments on free-ranging marine mammals are expected in late fall 2000. [Work supported by ONR.]