Bocconcelli Alessandro

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  • Technical Report
    Testing and evaluation of SURLYN foam and SPECTRA fiber ropes for buoy systems applications
    (Woods Hole Oceanographic Institution, 1988-08) Berteaux, Henri O. ; Bocconcelli, Alessandro ; Gould, Matthew R. ; Kery, Sean M.
  • Technical Report
    Development and evaluation of electromechanical cables for deep sea buoy applications
    (Woods Hole Oceanographic Institution, 1991-01) Bocconcelli, Alessandro
    Electromechanical (E/M cables have been developed in order to satisfy the growing need for real time data telemetry from oceanographic moorings. Several E/M cable designs have been implemented with the cooperation of private industry in order to accommodate E/M cable requirements for different mooring experiments. Surface and subsurface E/M cable applications are discussed with reference to WHOI Projects (ESOM, STEM, RTEAM). Floating tether and their special designs (concave up, S-tether) are also illustrated together with an evaluation of their performance at sea (RTEAM, MOIST, TETHERMOOR, ABRUPT TOPOGRAPHY). Data from material tests performed by the OS&M Labratory are reported in seven separate tables.
  • Article
    Clicking for calamari : toothed whales can echolocate squid Loligo pealeii
    (Inter-Research, 2007-11-27) Madsen, Peter T. ; Wilson, M. ; Johnson, Mark P. ; Hanlon, Roger T. ; Bocconcelli, Alessandro ; Aguilar De Soto, Natacha ; Tyack, Peter L.
    Squid play an important role in biomass turnover in marine ecosystems and constitute a food source for ~90% of all echolocating toothed whale species. Nonetheless, it has been hypothesized that the soft bodies of squid provide echoes too weak to be detected by toothed whale biosonars, and that only the few hard parts of the squid body may generate significant backscatter. We measured the acoustic backscatter from the common squid Loligo pealeii for signals similar to toothed whale echolocation clicks using an energy detector to mimic the mammalian auditory system. We show that the dorsal target strengths of L. pealeii with mantle lengths between 23 and 26 cm fall in the range from –38 to –44 dB, and that the pen, beak and lenses do not contribute significantly to the backscatter. Thus, the muscular mantle and fins of L. pealeii constitute a sufficient sonar target for individual biosonar detection by toothed whales at ranges between 25 and 325 m, depending on squid size, noise levels, click source levels, and orientation of the ensonified squid. While epipelagic squid must be fast and muscular to catch prey and avoid visual predators, it is hypothesized that some deep-water squid may have adopted passive acoustic crypsis, with a body of low muscle mass and low metabolism that will render them less conspicuous to echolocating predators.
  • Working Paper
    Bottom array specifications for the low frequency acoustic seismic experiment (LFASE)
    (Woods Hole Oceanographic Institution, 1991-10) Bocconcelli, Alessandro ; Berteaux, Henri O. ; Stephen, Ralph A. ; Spiess, Fred ; Spiess, Fred ; Craig, Harmon ; Spiess, Fred
    The Low Frequency Acoustic Seismic Experiment (LFASE) was conducted to measure sound propagation and ambient noise above, at and below the sea floor. To this end an array consisting of four geophone nodes was introduced into a DSDP borehole. These seismic sensors were clamped inside the borehole at various depths below the ocean floor. The geophone array was connected by an electromechanical cable to a bottom reentry structure (BCU frame) housing the Data Recording Unit (DRU), the Data Telemetry Unit (DTU), the Bottom Control Unit (BCU) and the power supply.
  • Technical Report
    Real-time environmental Arctic monitoring (R team) : interim report
    (Woods Hole Oceanographic Institution, 1987-11) Bocconcelli, Alessandro
    This interim report describes the development and testing of the R-TEAM system from the initial concept studies to the actual deployment and recovery of a working prototype at Site D, 39°N, 70°W (June 2 to August 3. 1987). The R-TEAM mooring is specifically designed to collect oceanic environmental data in the Arctic region and to transmit these data to shore on a daily basis via ARGOS satellite telemetry. To this end an ascent module comes to the surface once a day and transmits directly to ARGOS (ice free surface) or indirectly through a relatively adjacent MF receiver station (ice covered surface) which in turn relays the data to the ARGOS satellite. When not transmitting, the module remains in its rest position most of the time, well away from the surface. thus diminishing the risks of damage at the ice interface. The design life of the R-TEAM system is one year in situ. The mooring must be capable of deployment in depths of up to 4500 meters and must be able to withstand a maximum current speed of 2 knots at the surface.
  • Working Paper
    A sea floor winch system for wire line re-entry of deep sea boreholes
    (Woods Hole Oceanographic Institution, 1990-12) Berteaux, Henri O. ; Bocconcelli, Alessandro ; Koelsch, Donald E. ; Stephen, Ralph A.
    The following report describes the scientific motivations for the use of a Sea Floor Winch System for Wireline Re-entry of Deep Sea Boreholes and presents a conceptual design for the winch system.
  • Working Paper
    Photoidentification catalog of Cuvier's beaked whale (Ziphius cavirostris) in the Ligurian Sea
    (Woods Hole Oceanographic Institution. Contact: Alessandro Bocconcelli,, 2008-04-08T19:56:48Z) Revelli, Eletta ; Pusser, Todd ; Bocconcelli, Alessandro ; Ballardini, Marco ; Sturlese, Albert ; Johnson, Mark P.
    A photo-ID catalog of Cuvier's beaked whales was compiled by analyzing data collected in the Ligurian Sea from 1998 to 2007. Data were collected during dedicated surveys for beaked whales, opportunistic whale watching cruises, and during several tagging efforts. A total of 2,300 photographs was collected and referenced to time and GPS position. Of these photographs, 650 were of sufficient quality to use for photo-identification. Photographs were divided into four categories, based on scarring and pigmentation patterns: very distinctive (heavily scarred and/or bold pigmentation), distinctive (many distinct scars and/or bold pigmentation), slightly distinctive (few scars and lack of bold pigmentation), and not distinctive (no scars and solid brown animal). 127 individual whales were identified, of which 10 were classified as adult males, 3 as adult females, 3 as calves, and 27 as immature whales, based on the above criteria. An additional 26 whales were classified as possible males, and 28 as possible females. During the 9 year study period, 34 whales were resighted, and the longest time between resights was 7 years.
  • Preprint
    First observed wild birth and acoustic record of a possible infanticide attempt on a common bottlenose dolphin (Tursiops truncatus)
    ( 2015-06) Perrtree, Robin M. ; Sayigh, Laela S. ; Williford, Allison ; Bocconcelli, Alessandro ; Curran, Mary C. ; Cox, Tara M.
    We observed the birth of a common bottlenose dolphin (Tursiops truncatus) followed immediately by a possible infanticide attempt in the estuary near Savannah, Georgia. Our report is unique in several ways: first, we witnessed the birth of the calf; second, we observed infanticidal behavior almost immediately afterward; and third, we obtained acoustic recordings concurrent with the possible infanticidal behavior. Our observations provide insight into aggressive, possible infanticidal, behavior in bottlenose dolphins.
  • Technical Report
    ESOM I and II final report
    (Woods Hole Oceanographic Institution, 1991-11) Bocconcelli, Alessandro ; Berteaux, Henri O. ; Frye, Daniel E. ; Prindle, Bryce
    An Engineering Surface Oceanographic Mooring (ESOM) program was initiated in 1989 by the Woods Hole Oceanographic Institution for the purpose of evaluating the long term, in situ performance of new moored array materials and sensors. For logistic and practical reasons, a site 12 miles southwest of Bermuda, with a water depth of 3000m was selected to deploy the mooring. Following well established design practice the upper part of the mooring down to a depth of 1900m was made of plastic jacketed, steel armored wire ropes and cables. Groups of test samples were attached at different depths to the main mooring line. The lower part of the mooring was made of compliant, plaited nylon rope. The mooring was deployed in March 1989. It was recovered and reset, with a vertical acoustic telemetry prototype system, in April 1990. The at-sea phase of the program ended in November 1990 when the termination of a test cable failed and the mooring broke loose. The entire mooring was recovered and all of its samples and components were carefully inspected and tested. In addition to the novel acoustic link, mooring components tested included new wire ropes, new electromechanical cables and their terminations, low drag fairings, fishbite resistant jackets, and a new type of surface buoy.
  • Article
    Equipment to tag, track and collect biopsies from whales and dolphins: the ARTS, DFHorten and LKDart systems
    (BioMed Central, 2022-10-21) Kleivane, Lars ; Kvadsheim, Petter H. ; Bocconcelli, Alex ; Øien, Nils ; Miller, Patrick J. O.
    Of all animals considered subjects for instrumentation for behavioral or physiological studies, cetaceans probably represent the greatest challenge to the engineer and biologist. The marine environment being harsh to electronics, evasive behavior during tagging approaches and the short time window available to attach instruments, all imply a need for innovative tagging solutions to facilitate better understanding of their life cycle, migration, physiology, behavior, health and genetics. Several animal-attached tag packages holding specific data loggers, e.g., time depth recorders, position, orientation, acoustic and video recorders for short to medium term studies, as well as tags developed for large scale migration telemetry studies are available as off-the-shelf devices, or in many cases as custom made sensor packages. Deployment of those instruments is often the limiting factor for data collection. The Aerial Remote Tag System (ARTS) is a flexible system which can easily be adapted to deploy different tag sensor packages and biopsy collection devices. This paper presents the history and design of the ARTS, and accessories developed for instrumentation and biopsy sampling of cetaceans, such as the recent developed ARTS–LKDart for biopsy sampling. Deployment of archival tags usually requires radio tracking of the instrumented animal, or at least tracking of the tag for recovery. Thus, we also here describe the automatic digital signal processing radio direction finder, the Direction Finder Horten (DFHorten unit).
  • Article
    Acoustic recordings of rough-toothed dolphin (Steno bredanensis) offshore Eastern Sicily (Mediterranean Sea)
    (Acoustical Society of America, 2019-09-25) Caruso, Francesco ; Sciacca, Virginia ; Parisi, Ignazio ; Viola, Salvatore ; de Vincenzi, Giovanni ; Bocconcelli, Alessandro ; Mooney, T. Aran ; Sayigh, Laela S. ; Li, Songhai ; Filiciotto, Francesco ; Moulins, Aurelie ; Tepsich, Paola ; Rosso, Massimiliano
    ough-toothed dolphin's abundance and distribution is largely unknown worldwide and evaluation of its conservation status in the Mediterranean Sea is necessary. A rough-toothed dolphin was sighted offshore Eastern Sicily (Mediterranean Sea) in July 2017 and acoustic data were acquired in the same area of Watkins, Tyack, Moore, and Notarbartolo di Sciara [(1987). Mar. Mamm. Sci. 3, 78–82]. An automatic detection algorithm was developed to identify the echolocation clicks recorded within both datasets and a recurrent inter-click interval value was identified during the new encounter. Distinctive whistle classes were also identified with similar contour shapes within both datasets.
  • Article
    Bottom side-roll feeding by humpback whales (Megaptera novaeangliae) in the southern Gulf of Maine, U.S.A
    (John Wiley & Sons, 2013-07-24) Ware, Colin ; Wiley, David N. ; Friedlaender, Ari S. ; Weinrich, Mason T. ; Hazen, Elliott L. ; Bocconcelli, Alessandro ; Parks, Susan E. ; Stimpert, Alison K. ; Thompson, Michael A. ; Abernathy, Kyler
    Humpback whales (Megaptera novaeangliae) are known for the variety and complexity of their feeding behaviors. Here we report on the use of synchronous motion and acoustic recording tags (DTAGs) to provide the first detailed kinematic descriptions of humpback whales using bottom side-rolls (BSRs) to feed along the seafloor. We recorded 3,505 events from 19 animals (individual range 8–722). By animal, mean BSR duration ranged from 14.1 s to 36.2 s.; mean body roll angle from 80º to 121º, and mean pitch from 7º to 38º. The median interval between sequential BSRs, by animal, ranged from 24.0 s to 63.6 s and animals tended to maintain a consistent BSR heading during long BSR series encompassing multiple dives. BSRs were most frequent between 2200 and 0400. We identify three classes of behavior: simple side-roll, side-roll inversion, and repetitive scooping. Results indicate that BSR feeding is a common technique in the study area and there is both coordination and noncoordination between animals. We argue that this behavior is not lunge feeding as normally characterized, because animals are moving slowly through the event. The behavior also leads to vulnerability to entanglement in bottom-set fishing gear, a major mortality factor for the species.
  • Technical Report
    Atlantic Long-Term Oceanographic Mooring (ALTOMOOR)
    (Woods Hole Oceanographic Institution, 1996-03) Frye, Daniel E. ; Merriam, Steve ; Eastwood, Robert L. ; Kemp, John N. ; McPhee, Neil M. ; Liberatore, Stephen P. ; Hobart, Edward ; Bocconcelli, Alessandro ; Tarbell, Susan A.
    The Atlantic Long-Term Oceanogrphic Mooring (ALTOMOOR) has been maintained offshore Bermuda since 1993 as a testbed for the evaluation of new data telemetry technologies and new oceanographic instrumentation. It is currently a joint project between the Woods Hole Oceanographic Institution and the University of Southern California This report documents the WHOI contributions which have focused on the development of new data telemetry methods and new mooring technology. Details of the instrumentation evaluations will be published separately. A new inductively-coupled telemetry technology for ocean moorings has been developed and tested on ALTOMOOR. The inductive link uses standard, plastic-jacketed mooring wire as the transmission path for data generated at the individual instruments installed on the mooring. The signals are inductively linked to the mooring wire via toroids clamped around the wire, thus avoiding the need for multiconductor electromechanical cables terminated at each instrument. Seawater provides the electrical return path. The inductive modems send and receive data at 1200b/s. A controller in the surface buoy collects data from each of the subsurface instruments and forwards the data to shore by traditional satellite telemetry (Argos) and by short range radio using a nearby ship as a store and forward node. The buoy-to-ship link operates over about 2 km at 10kBytes/sec. When the ship docks, data are offloaded automatically to a computer on shore which can be accessed via the Internet.
  • Article
    Probable signature whistle production in Atlantic white-sided (Lagenorhynchus acutus) and short-beaked common (Delphinus delphis) dolphins near Cape Cod, Massachusetts
    (Wiley, 2022-09-15) Cones, Seth ; Dent, Molly ; Walkes, Sam ; Bocconcelli, Alessandro ; DeWind, Christianna ; Arjasbi, Kayla ; Rose, Kathryn S. ; Silva, Tammy L. ; Sayigh, Laela S.
    Some delphinids produce a learned, individually specific tonal whistle that conveys identity information to conspecifics (Janik & Sayigh, 2013). These whistles, termed signature whistles, were first described by Caldwell and Caldwell (1965) and have been studied intensively over the past several decades (Janik & Sayigh, 2013). In common bottlenose dolphins (Tursiops truncatus) and potentially other species, signature whistles facilitate many ecologically-important behaviors, including individual recognition and maintenance of group cohesion (Janik & Slater, 1998). Additionally, signature whistle contours, or patterns of frequency change over time, can remain stable for several decades, aiding in long-term social bonds (Sayigh et al., 1990). Signature whistles account for approximately 38%–70% of all whistle production in free-swimming animals (Buckstaff, 2004; Cook et al., 2004; Watwood et al., 2005); this percentage can be up to 100% for isolated individuals in captivity (Caldwell et al., 1990). Most of our knowledge on the function and use of signature whistles stems from Tursiops spp., and their use and presence in other delphinid taxa is less understood. Nonetheless, seven additional delphinid species have been reported to produce signature whistles: Indo-Pacific bottlenose dolphins (Tursiops aduncus; Gridley et al., 2014), common dolphins (D. delphis; Caldwell & Caldwell 1968; Fearey et al., 2019), Atlantic spotted dolphins (Stenella plagiodon; Caldwell et al., 1970), Pacific white-sided dolphins (Lagenorhynchus obliquidens; Caldwell & Caldwell, 1973), Pacific humpback dolphins (Sousa chinensis; Van Parijs & Corkeron, 2001), and Guiana dolphins (Sotalia guianensis; Duarte de Figueiredo & Simão, 2009).
  • Article
    TOSSIT: a low-cost, hand deployable, rope-less and acoustically silent mooring for underwater passive acoustic monitoring
    (Elsevier, 2022-04-19) Zitterbart, Daniel ; Bocconcelli, Alessandro ; Ochs, Miles ; Bonnel, Julien
    Passive Acoustic Monitoring (PAM) has been used to study the ocean for decades across several fields to answer biological, geological and meteorological questions such as marine mammal presence, measures of anthropogenic noise in the ocean, and monitoring and prediction of underwater earthquakes and tsunamis. While in previous decades the high cost of acoustic instruments limited its use, miniaturization and microprocessor advances dramatically reduced the cost for passive acoustic monitoring instruments making PAM available for a broad scientific community. Such low-cost devices are often deployed by divers or on mooring lines with a surface buoy, which limit their use to diving depth and coastal regions. Here, we present a low-cost, low self-noise and hand-deployable PAM mooring design, called TOSSIT. It can be used in water as deep as 500 m, and can be deployed and recovered by hand by a single operator (more comfortably with two) in a small boat. The TOSSIT modular mooring system consists of a light and strong non-metallic frame that can fit a variety of sensors including PAM instruments, acoustic releases, additional power packages, environmental parameter sensors. The TOSSIT’s design is rope-less, which removes any risk of entanglement and keeps the self-noise very low.
  • Working Paper
    Seafloor borehole array seismic system (SEABASS)
    (Woods Hole Oceanographic Institution, 1993-01) Stephen, Ralph A. ; Koelsch, Donald E. ; Berteaux, Henri O. ; Bocconcelli, Alessandro ; Bolmer, S. Thompson ; Cretin, J. ; Etourmy, N. ; Fabre, A. ; Goldsborough, Robert G. ; Gould, Matthew R. ; Kery, Sean M. ; Laurent, J. ; Omnes, G. ; Peal, Kenneth R. ; Swift, Stephen A. ; Turpening, R. ; Zani, A. Cleo
    The Seafloor Borehole Array Seismic System (SEABASS) has been developed to measure the pressure and three dimensional particle velocity of the VLF sound field (2-50HZ) below the seafloor in the deep ocean (water depths of up to 6km). The system consists off our three-component borehole seismometers (with an optional hydrophone), a borehole digitizing unit, and a seafloor control and recording package. The system can be deployed using a wire line re-entry capability from a conventional research vessel in Deep Sea Drilling Project (DSDP) and Ocean Drilling Project (ODP) boreholes. Data from below the seafloor are acquired either on-board the research vessel via coaxial tether or remotely on the seafloor in a self-contained package. If necessary the data module from the seafloor package can be released independently and recovered on the surface. This paper describes the engineering specifications of SEABASS, the tests that were carried out, and preliminary results from an actual deep sea deployment. Ambient noise levels beneath the seafloor acquired on the Low Frequency Acoustic-Seismic Experiment (LFASE) are within 20dB of levels from previous seafloor borehole seismic experiments and from land borehole measurements. The ambient noise observed on LFASE decreases by up to 12dB in the upper 100m of the seafloor in a sedimentary environment.
  • Article
    Photogrammetry of blue whales with an unmanned hexacopter
    (John Wiley & Sons, 2016-05-06) Durban, John W. ; Moore, Michael J. ; Chiang, Gustavo ; Hickmott, Leigh S. ; Bocconcelli, Alessandro ; Howes, Gloria ; Bahamonde, Paulina A. ; Perryman, Wayne L. ; LeRoi, Donald J.
    Baleen whales are the largest animals ever to live on earth, and many populations were hunted close to extinction in the 20th century (Clapham et al. 1999). Their recovery is now a key international conservation goal, and they are important in marine ecosystems as massive consumers that can promote primary production through nutrient cycling (Roman et al. 2014). However, although abundance has been assessed to monitor the recovery of some large whale populations (e.g., Barlow et al. 2011, Laake et al. 2012) many populations are wide-ranging and pelagic, and this inaccessibility has generally impeded quantitative assessments of recovery (Peel et al. 2015). To augment traditional abundance monitoring, we suggest that photogrammetric measures of individual growth and body condition can also inform about population status, enabling assessment of individual health as well as population numbers. Photogrammetry from manned aircraft has used photographs taken from directly above whales to estimate individual lengths (Gilpatrick and Perryman 2008) and monitor growth trends (Fearnbach et al. 2011), and shape profiles can be measured to assess body condition to infer reproductive and nutritional status (e.g., Perryman and Lynn 2002, Miller et al. 2012). Recently, Durban et al. (2015) demonstrated the utility of an unmanned hexacopter for collecting aerial photogrammetry images of killer whales (Orcinus orca); this provided a noninvasive, cost-effective, and safe platform that could be deployed from a boat to obtain vertical images of whales. Here we describe the use of this small, unmanned aerial system (UAS) to measure length and condition of blue whales (Balaenoptera musculus), the largest of all whales.
  • Article
    Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia
    (Wiley, 2020-11-09) Caruso, Francesco ; Hickmott, Leigh S. ; Warren, Joseph D. ; Segre, Paolo ; Chiang, Gustavo ; Bahamonde, Paulina A. ; Español-Jiménez, Sonia ; Li, Songhai ; Bocconcelli, Alessandro
    The northern Chilean Patagonia region is a key feeding ground and a nursing habitat in the southern hemisphere for blue whales (Balaenoptera musculus). From 2014 to 2019, during 6 separate research cruises, the dive behavior of 28 individual blue whales was investigated using bio‐logging tags (DTAGs), generating ≈190 h of data. Whales dove to significantly greater depths during the day compared to nighttime (day: 32.6 ± 18.7 m; night: 6.2 ± 2.7 m; P < 0.01). During the night, most time was spent close to the surface (86% ± 9.4%; P < 0.01) and at depths of less than 12 m. From 2016 to 2019, active acoustics (scientific echosounders) were used to record prey (euphausiids) density and distribution simultaneously with whale diving data. Tagged whales appeared to perform dives relative to the vertical migration of prey during the day. The association between diurnal prey migration and shallow nighttime dive behavior suggests that blue whales are at increased risk of ship collisions during periods of darkness since the estimated maximum ship draft of vessels operating in the region is also ≈12 m. In recent decades, northern Chilean Patagonia has seen a large increase in marine traffic due to a boom in salmon aquaculture and the passenger ship industry. Vessel strike risks for large whales are likely underestimated in this region. Results reported in this study may be valuable for policy and mitigation decisions regarding conservation of the endangered blue whale.
  • Technical Report
    In situ measurements of the dynamics of a full scale bottom moored mine model
    (Woods Hole Oceanographic Institution, 1993-06) Berteaux, Henri O. ; Bocconcelli, Alessandro ; Eck, Calvert F. ; Kery, Sean M.
    Under the sponsorship of the Naval Surface Warfare Center (NSWC), Dalgren Division, White Oak, Marland, the Ocean Systems & Mooring Laboratory of the Woods Hole Oceanographic Institution devised (1991) and conducted (1992) an experiment to measure the dynamic response of a full scale model of the CAPTOR mine, submerged and moored in strong tidal currents near Woods Hole, MA. Specifically, the purpose of this sophisticated engineering experiment was to obtain long term, high frequency measurements of the spatial position of the CAPTOR body, of the tension at both ends of the mooring line, and of the mooring line strumming, as a function of the currents prevailing at the site. This report first describes the main components and the method of deployment of the complex CAPTOR Dynamics Experiment (CAPTORDYN) set up. It then presents the mechanical and electrical designs of the entire system. Finally a review of the results obtained concludes the report.
  • Article
    Characterizing Chilean blue whale vocalizations with DTAGs : a test of using tag accelerometers for caller identification
    (Company of Biologists, 2017-09-07) Saddler, Mark R. ; Bocconcelli, Alessandro ; Hickmott, Leigh S. ; Chiang, Gustavo ; Landea Briones, Rafaela ; Bahamonde, Paulina A. ; Howes, Gloria ; Segre, Paolo S. ; Sayigh, Laela S.
    Vocal behavior of blue whales (Balaenoptera musculus) in the Gulf of Corcovado, Chile, was analysed using both audio and accelerometer data from digital acoustic recording tags (DTAGs). Over the course of three austral summers (2014, 2015 and 2016), seventeen tags were deployed, yielding 124 h of data. We report the occurrence of Southeast Pacific type 2 (SEP2) calls, which exhibit peak frequencies, durations and timing consistent with previous recordings made using towed and moored hydrophones. We also describe tonal downswept (D) calls, which have not been previously described for this population. As being able to accurately assign vocalizations to individual whales is fundamental for studying communication and for estimating population densities from call rates, we further examine the feasibility of using high-resolution DTAG accelerometers to identify low-frequency calls produced by tagged blue whales. We cross-correlated acoustic signals with simultaneous tri-axial accelerometer readings in order to analyse the phase match as well as the amplitude of accelerometer signals associated with low-frequency calls, which provides a quantitative method of determining if a call is associated with a detectable acceleration signal. Our results suggest that vocalizations from nearby individuals are also capable of registering accelerometer signals in the tagged whale's DTAG record. We cross-correlate acceleration vectors between calls to explore the possibility of using signature acceleration patterns associated with sounds produced within the tagged whale as a new method of identifying which accelerometer-detectable calls originate from the tagged animal.