Conferences related to Acoustic Receivers

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Oceans 2020 MTS/IEEE GULF COAST

To promote awareness, understanding, advancement and application of ocean engineering and marine technology. This includes all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

  • OCEANS 2018 MTS/IEEE Charleston

    Ocean, coastal, and atmospheric science and technology advances and applications

  • OCEANS 2017 - Anchorage

    Papers on ocean technology, exhibits from ocean equipment and service suppliers, student posters and student poster competition, tutorials on ocean technology, workshops and town meetings on policy and governmental process.

  • OCEANS 2016

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 500 technical papers and 150 -200 exhibits.

  • OCEANS 2015

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2014

    The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2013

    Three days of 8-10 tracks of technical sessions (400-450 papers) and concurent exhibition (150-250 exhibitors)

  • OCEANS 2012

    Ocean related technology. Tutorials and three days of technical sessions and exhibits. 8-12 parallel technical tracks.

  • OCEANS 2011

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2010

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2009

  • OCEANS 2008

    The Marine Technology Society (MTS) and the Oceanic Engineering Society (OES) of the Institute of Electrical and Electronic Engineers (IEEE) cosponsor a joint conference and exposition on ocean science, engineering, education, and policy. Held annually in the fall, it has become a focal point for the ocean and marine community to meet, learn, and exhibit products and services. The conference includes technical sessions, workshops, student poster sessions, job fairs, tutorials and a large exhibit.

  • OCEANS 2007

  • OCEANS 2006

  • OCEANS 2005

  • OCEANS 2004

  • OCEANS 2003

  • OCEANS 2002

  • OCEANS 2001

  • OCEANS 2000

  • OCEANS '99

  • OCEANS '98

  • OCEANS '97

  • OCEANS '96


2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore


2019 IEEE International Ultrasonics Symposium (IUS)

The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.


2019 IEEE/MTT-S International Microwave Symposium - IMS 2019

Comprehensive symposium on microwave theory and techniques including active and passive circuit components, theory and microwave systems.

  • 2036 IEEE/MTT-S International Microwave Symposium - IMS 2036

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2031 IEEE/MTT-S International Microwave Symposium - IMS 2031

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2029 IEEE/MTT-S International Microwave Symposium - IMS 2029

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2026 IEEE/MTT-S International Microwave Symposium - IMS 2026

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2025 IEEE/MTT-S International Microwave Symposium - IMS 2025

    The IEEE International Microwave Symposium (IMS) is the world s foremost conferencecovering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies;encompassing everything from basic technologies to components to systems including thelatest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulationand more. The IMS includes technical and interactive sessions, exhibits, student competitions,panels, workshops, tutorials, and networking events.

  • 2024 IEEE/MTT-S International Microwave Symposium - IMS 2024

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2021 IEEE/MTT-S International Microwave Symposium - IMS 2021

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.

  • 2020 IEEE/MTT-S International Microwave Symposium (IMS)

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2018 IEEE/MTT-S International Microwave Symposium - IMS 2018

    Microwave theory and techniques, RF/microwave/millimeter-wave/terahertz circuit design and fabrication technology, radio/wireless communication.

  • 2017 IEEE/MTT-S International Microwave Symposium - IMS 2017

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.

  • 2016 IEEE/MTT-S International Microwave Symposium - IMS 2016

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2015 IEEE/MTT-S International Microwave Symposium - MTT 2015

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics. The IMS includes technical sessions, both oral and interactive, worksh

  • 2014 IEEE/MTT-S International Microwave Symposium - MTT 2014

    IMS2014 will cover developments in microwave technology from nano devices to system applications. Technical paper sessions, interactive forums, plenary and panel sessions, workshops, short courses, industrial exhibits, and a wide array of other technical activities will be offered.

  • 2013 IEEE/MTT-S International Microwave Symposium - MTT 2013

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter -wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2012 IEEE/MTT-S International Microwave Symposium - MTT 2012

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2010 IEEE/MTT-S International Microwave Symposium - MTT 2010

    Reports of research and development at the state-of-the-art of the theory and techniques related to the technology and applications of devices, components, circuits, modules and systems in the RF, microwave, millimeter-wave, submillimeter-wave and Terahertz ranges of the electromagnetic spectrum.

  • 2009 IEEE/MTT-S International Microwave Symposium - MTT 2009

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2008 IEEE/MTT-S International Microwave Symposium - MTT 2008

  • 2007 IEEE/MTT-S International Microwave Symposium - MTT 2007

  • 2006 IEEE/MTT-S International Microwave Symposium - MTT 2006

  • 2005 IEEE/MTT-S International Microwave Symposium - MTT 2005

  • 2004 IEEE/MTT-S International Microwave Symposium - MTT 2004

  • 2003 IEEE/MTT-S International Microwave Symposium - MTT 2003

  • 2002 IEEE/MTT-S International Microwave Symposium - MTT 2002

  • 2001 IEEE/MTT-S International Microwave Symposium - MTT 2001

  • 2000 IEEE/MTT-S International Microwave Symposium - MTT 2000

  • 1999 IEEE/MTT-S International Microwave Symposium - MTT '99

  • 1998 IEEE/MTT-S International Microwave Symposium - MTT '98

  • 1997 IEEE/MTT-S International Microwave Symposium - MTT '97

  • 1996 IEEE/MTT-S International Microwave Symposium - MTT '96


2019 Joint Conference of the IEEE International Frequency Control Symposium anEuropean Frequency and Time Forum (EFTF/IFC)

The 33RD European Frequency and Time Forum and the 73rd consecutive meeting of the IEEE International Frequency Control Symposium will be held as a joint conference in Orlando, Florida, USA April 14-18, 2019. The conference will provide information on recent advances and trends on scientific research, development and manufacturing technology in the area of frequency and time and frequency control. A technical exhibition will be held during the conference, which will be hosted at the Caribe Royale Hotel and Convention Center.


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Periodicals related to Acoustic Receivers

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Aerospace and Electronic Systems Magazine, IEEE

The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.


Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Audio, Speech, and Language Processing, IEEE Transactions on

Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Broadcasting, IEEE Transactions on

Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.


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Most published Xplore authors for Acoustic Receivers

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Xplore Articles related to Acoustic Receivers

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Telemetry receiver and acoustic command system

Ocean '74 - IEEE International Conference on Engineering in the Ocean Environment, 1974

A shipboard Telemetry Receiver Acoustic Command System (TRACS) was designed to be used for two way acoustic communication with and relocation of underwater instruments. The design objectives were compact size, low cost, multi-purpose capabilities, and ease of operation and maintenance of the system. The telemetry receiver system utilizes a four-hydrophone array, bandpass filters and amplifiers, precision time-base for synchronization, a ...


Near field calibration arrays for acoustic wavefield determination

[1991] Conference Record. IEEE Instrumentation and Measurement Technology Conference, 1991

A description is given of the use of the near-field calibration array (NFCA) to determine the far-field properties of acoustic receivers and projectors by measurements made in their near field. When used as a projector to evaluate receivers, the NFCA produces a nearly uniform plane wave over a large volume in its near field and over a large frequency range. ...


Ultrasonic Lamb Wave Inspection Using Fiber Bragg Gratings

2008 China-Japan Joint Microwave Conference, 2008

A new ultrasonic Lamb wave nondestructive testing (NDT) system is developed in this paper. The basic idea is to use fiber Bragg gratings (FBG) sensors as acoustic receivers of ultrasonic Lamb waves. The spectral response of fiber Bragg gratings (FBGs) subjected to the ultrasonic field has been theoretically and numerically investigated. Taking into account the geometrical and elasto- optic effects, ...


A Pulsed Technique for Measuring the Directional Characteristics of Acoustic Receivers

IEEE 1984 Ultrasonics Symposium, 1984

None


Mitigating ambient noise in underwater acoustic receivers using independent component analysis

2011 International Symposium on Ocean Electronics, 2011

The acoustic ambience of the ocean is extremely turbid with a myriad of heterogeneous competing sources, of both manmade and natural origin. The cumulative clamour of sources like shipping, sonar, coastal machines, marine life, shore waves, as well as other hydrodynamic activities can often lift the noise floor to much higher levels so that the vital signals are masked and ...


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Educational Resources on Acoustic Receivers

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IEEE-USA E-Books

  • Telemetry receiver and acoustic command system

    A shipboard Telemetry Receiver Acoustic Command System (TRACS) was designed to be used for two way acoustic communication with and relocation of underwater instruments. The design objectives were compact size, low cost, multi-purpose capabilities, and ease of operation and maintenance of the system. The telemetry receiver system utilizes a four-hydrophone array, bandpass filters and amplifiers, precision time-base for synchronization, a writing amplifier, and a helix, wet-paper recorder. The Acoustic Command System (ACS) incorporates an adjustable digital acoustic command generator, a power amplifier, an underwater sound transducer and an adjustable ACS test output circuit useful for alignment of underwater acoustic receivers. Two systems have been used successfully at sea on four cruises.

  • Near field calibration arrays for acoustic wavefield determination

    A description is given of the use of the near-field calibration array (NFCA) to determine the far-field properties of acoustic receivers and projectors by measurements made in their near field. When used as a projector to evaluate receivers, the NFCA produces a nearly uniform plane wave over a large volume in its near field and over a large frequency range. When used as a receiver to evaluate projectors, the NFCA becomes a plane-wave filter for acoustic radiation (or target scattering) originating from within the plane-wave volume. The basis of the NFCA is a reciprocity principle. Numerical implementation of this principle provides the complex weighting factors to be used as shading coefficients for the individual elements in the NFCA. The original Trott NFCAs were planar. Extensions of the concept to a cylindrical NFCA suitable for determining the azimuthal far-field pattern and to a spherical NFCA that allows a determination of the entire three-dimensional far-field pattern are presented.<<ETX>>

  • Ultrasonic Lamb Wave Inspection Using Fiber Bragg Gratings

    A new ultrasonic Lamb wave nondestructive testing (NDT) system is developed in this paper. The basic idea is to use fiber Bragg gratings (FBG) sensors as acoustic receivers of ultrasonic Lamb waves. The spectral response of fiber Bragg gratings (FBGs) subjected to the ultrasonic field has been theoretically and numerically investigated. Taking into account the geometrical and elasto- optic effects, the Bragg effective refractive index modulation under the ultrasonic wave action is deduced. A transfer matrix method is used to analyze the influence of ultrasound on the reflection spectrum of FBGs. Numerical results show that the influence of ultrasonic field on grating spectrum is highly correlated to the ratio between the ultrasonic wavelength and the grating length. Only when the ratio is quite larger, the peak wavelength of reflection spectrum shifts while the shape of the grating remains unchanged. The reason is explained by the strain variation along the grating. The results of this analysis provide useful tools for the determination of gage length of FBG sensor and the choice of Lamb wave frequency when the new NDT system is used for damage detection.

  • A Pulsed Technique for Measuring the Directional Characteristics of Acoustic Receivers

    None

  • Mitigating ambient noise in underwater acoustic receivers using independent component analysis

    The acoustic ambience of the ocean is extremely turbid with a myriad of heterogeneous competing sources, of both manmade and natural origin. The cumulative clamour of sources like shipping, sonar, coastal machines, marine life, shore waves, as well as other hydrodynamic activities can often lift the noise floor to much higher levels so that the vital signals are masked and buried well below the recognizable level. The accuracy and reliability of acoustic systems and devices depend on the degree of observability of a signal above the background noise or the ambient noise floor. In this paper an attempt is made to reveal the latent source signals from the observed mixture by carrying out the Independent Component Analysis (ICA) thereby mitigating the ambient noise levels to a practically acceptable level. In the proposed prototype, FastICA, the most popular and computationally efficient algorithm is being utilized.

  • Localization of a sound source: Optimal positioning of sensors carried on autonomous surface vehicles

    This paper addresses the problem of optimal, three-dimensional, localization of an acoustic pinger. Making use of acoustic receivers, the time-of-arrivals are computed and fused with their positions to estimate the target position. Motivated by practical applications where autonomous surface vehicles are employed to carry sensing equipment, these receivers are constrained to lie in a plane. The optimal configuration of sensors is derived by maximizing the determinant of the Fisher information matrix. A method to track and estimate the position of the target is proposed and implemented in a formation of four vehicles. Experimental results show very motivating results with successful estimates of the target position.

  • Advances in moored upward looking sonar systems for long term measurement of arctic ice and oceanography

    A major impetus for scientific studies of climate change in the Arctic Ocean has been the reduction in the areal extent and thickness of its sea ice cover which has been experienced at accelerated rates in the past decade. These dramatic changes resulted in major climate science studies being conducted in the Arctic Ocean as well as opening the way for increased shipping and offshore oil and gas activities. An extended measurement record of the horizontal dimensions of this ice cover is available for the full Arctic Ocean Basin based upon a record compiled from nearly 40 years of relatively continuous satellite based measurements. Unfortunately, data accumulations for the ice cover's vertical dimension, i.e. sea ice thickness, as well as full temporal resolution ice velocity and under-ice ocean current profiles tend to be limited to a small number of year-long mooring data sets with durations that are only a few to several years, reflecting underlying greater measurement challenges. Moreover, the longest duration ice thickness data collection efforts, spanning more than 10 years, have been confined only to two specific portions of the Basin, namely, Fram Strait and the Canadian sector of the Beaufort Sea. However, in the past ten years, the available year-long ice and oceanographic mooring data sets have greatly increased in total number and in the number of sites. Advanced upward-looking sonar (ULS) instruments operated from subsurface moorings has been and continues to be the primary source of data with volumes and accuracy sufficient for meaningfully monitoring ice thickness, ice velocities, ocean current profiles and other in- situ water properties. The ice thickness, or more properly ice draft (underwater ice thickness) data is measured continuously with temporal resolution of 1 -2 seconds. Technological advances, since ULS instruments were first developed in the 1980's have led to new generations of iceprofiling sonar (IPS), incorporating much expanded on-board data storage capacities (up to 16 Gigabytes) and powerful realtime firmware which now allow unprecedented temporal (ping rates of up to 1 Hz). When combined with ULS Acoustic Doppler Current Profiler (ADCP) instrumentation using a special ice tracking mode (with a temporal resolution of a few minutes), details of the ice topography can be realized to resolutions of better than 0.1 m in the vertical and 1 m in the horizontal. These very high resolution ice draft measurements fully resolve individual ice features including undeformed level ice, brash ice, individual large ice keels including multi-year ice, hummocky ice rubble fields, glacial ice including icebergs and ice islands, and open water interruptions of the ice cover including leads between ice floes. Such continuous highly detailed ice measurements, along with concurrent measurements of ice velocities and ocean current profiles, are essential to understandings of mechanical and thermodynamical aspects of sea ice processes which govern ocean-atmosphere exchanges in polar waters, thereby determining ice extent and thickness parameters. The ice profiler ULS instrument can sample at higher sampling frequencies to measure non-directional ocean wave spectra and parameters (significant and individual maximum wave heights and peak periods) both during the period of mostly open water, often from mid- summer to mid-autumn, and also when ocean waves propagate into the periphery of the Arctic Ocean pack ice. Ocean wave interactions with pack ice are important in understanding the fracturing of sea ice floes and hastening the deterioration and melt of sea ice. The ULS data provide the first detailed measurements of such ocean wave - ice processes. A major challenge in moored ULS measurement systems is the inaccessibility of the measurement sites to ship logistics due to the very remote areas in the Arctic Ocean and its peripheral seas and the difficulty, resulting in very high logistic costs, of deployment and servicing the moorings due to the sea ice itself. This challenge is being addressed through the development of expanded capacity and more efficient internal power capability and increased onboard data storage, along with very high instrument reliability. With expanded alkaline battery packs, continuous operation for 2 to 3 years is now possible; lithium battery packs are being developed that will extend the in-situ ULS instrument operation to approximately five years. To provide access to the ULS data between mooring servicing intervals, two different approaches are being developed. In some areas cabled underwater observatory technology can be installed to provide real-time access to the ULS ice measurements in support of navigation and oil and gas exploration activities as previously described in Fissel et al. (2009) for sub-Arctic applications. The first such ocean observatory involving a ULS ice instrument was commissioned at Cambridge Bay in the Canadian Arctic in September 2012. At locations far from shorelines, the challenges become even greater. For offshore oil and gas drilling applications, an array of subsurface ULS moorings spanning distances of tens of kilometers, interconnected via bottom mounted fiber optics cable systems interfaced to the moored ULS instruments and to vessel platforms using acoustic modems, have been designed to provide tactical support for ice management operations in support of drilling activities. An alternative approach to provide yearly access to the multi-year moored ULS data sets is the development of small expendable buoyant “datapods” which store the ULS data on flash cards; during times of open water or very thin ice, the datapods are released from the mooring to float to the surface and the ULS data is then transmitted via satellite to provide remote access to the scientific users. There are variations on this approach involving aircraft landing on sea ice in the vicinity of the subsurface ULS moorings to access the data via on-command acoustic modem transmission of the data to acoustic receivers operated through ice holes.

  • Near-field calibration arrays for acoustic wavefield determination

    The use of near-field calibration array (NFCA) to determine the far-field properties of acoustic receivers and projectors by measurements made in their near-field is described. When used as a projector to evaluate receivers, the NFCA produces a nearly uniform plane wave over a large volume in its near- field and over a large frequency range. When used as a receiver to evaluate projectors, the NFCA becomes a plane-wave filter for acoustic radiation (or target scattering) originating from within the plane-wave volume. The basis of the NFCA is a reciprocity principle. Numerical implementation of this principle provides the complex weighting factors to be used as shading coefficients for the individual elements in the NFCA. The original Trott NFCAs, given by W.J. Trott (see J. Acoust. Soc. Am., vol.36, p.1557-68, Aug. 1964), were planar. Subsequent extensions of the concept to a cylindrical NFCA suitable for determining the azimuthal far-field pattern and to a spherical NFCA that allows a determination of the entire three-dimensional far-field pattern are described.<<ETX>>

  • A Pulsed Near-Field Technique for Measuring the Directional Characteristics of Acoustic Receivers

    None

  • Integrated Management and Visualization of Animal Telemetry Observations: Serving data from a wide variety of platforms used in animal telemetry

    In the past two decades, rapid advances in animal transmitters, data storage tags and tracking technology have made it possible to use animals to collect high quality biological and oceanographic observations as they cruise through ocean habitats. However, despite significant investment in tagging and tracking technology, integrated data management and visualization systems have lacked. The growing volume of these data holdings, the large diversity of tag types and data formats, and the general lack of data management are not only complicating integration and synthesis of animal telemetry and tracking data but potentially threatening the integrity and longer-term access to these valuable datasets. To address this critical gap, the United States Integrated Ocean Observing System (U.S. IOOS) Animal Telemetry Data Management and Visualization System (ATN DAC) has been developed to provide an integrated system of most known transmitters and tracking systems. The ATN DAC in its first version provides a clean and intuitive Google Maps-based user interface with simple, color-coded icons for various tag types, including satellite- linked tags, archival tags, pop-up satellite archival tags, acoustic receiver buoys and autonomous mobile gliders equipped with acoustic receivers. For each tag type, the user can display additional data (e.g., animal track, acoustic detections) by simply clicking on the icons. An icon click also presents the user with a variety of additional options, which vary by platform. These include: display or download depth and temperature profile or conductivity data, display or download animal tracking data, display or download detection data, or view and query datasets through a webservice such as NOAAEnvironmental Research Division's Data Access Protocol (ERDDAP) server. These data management and visualization tools are designed to enable Animal Telemetry data sharing and integrating biological data with environmental data observations and models. In this presentation we provide an overview of the ATN DAC data management and visualizations capabilities (figure 1) and linking this data service to ocean models and applications.



Standards related to Acoustic Receivers

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IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets

This standard provides the techniques for objective measurement of electroacoustic characteristics of analog and digital telephones, handsets and headsets. Application is in the frequency range from 100 Hz to 8500 Hz. Although not specifically within the scope of this standard, the methods described are generally applicable to a wide variety of other communications equipment, including cordless, wireless and mobile communications ...



Jobs related to Acoustic Receivers

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