Hydrophones Articles

  • Yorkshire Water uses AQUASCAN TM2 for trunk main leak detection - Case Study

    Introduction After initial meetings about suspected leakage and NRW losses with Craig Needham and Piotr Kozeil from Yorkshire Water a trial was arranged to use the GUTERMANN AQUASCAN TM2 correlator. An initial location on an 18” Cast Iron trunk main was identified from Longwood Service Reservoir feeding ...


    By Gutermann AG

  • The future of leak detection starts today

    For many water engineers the day in the office begins with a look at the screen. They can analyse the results of the nightly measurements of their fresh water pipelines in a few minutes and make important decisions for the day. Are there any new leaks in the system? Using the information found, the water engineer can send his workers to precisely those points that the leak detection system has ...


    By Gutermann AG

  • NoiseNews: Something Fishy Going on in British Waters?

    The seas around Britain may be getting too noisy. So noisy in fact that fish species such as cod and haddock are having difficulty communicating with each other. If their chatter is being obscured, it could affect their ability to breed at a time when stock numbers are recovering. It has long been recognised that large marine mammals are susceptible to noise pollution – as ...


    By Cirrus Research plc

  • Ping-ping, what’s that sound? Acoustic fiber optic technology helps identify problematic water mains

    With the deteriorating state of many aging water mains found in cities across North America, urbanites are frequently witnessing unexpected plumes of water erupt as man-made geysers in their own metropolitan backyards. While natural geysers are awe inspiring, urban geysers are much less so, due to their destruction to property, roads and the environment. Because an uninterrupted water flow is the ...

  • Ping-Ping, What’s That Sound? Acoustic Fiber Optic Technology Helps Identify Problematic Water Mains

    With the deteriorating state of many aging water mains found in cities across North America, urbanites are frequently witnessing unexpected plumes of water erupt as man-made geysers in their own metropolitan backyards. While natural geysers are awe inspiring, urban geysers are much less so, due to their destruction to property, roads and the environment. Because an uninterrupted water flow is the ...

  • A novel acoustic imaging tool for monitoring the state of rapid sand filters

    A new technology based on acoustic waves is developed to monitor the state of sand filters used in drinking water treatment. Changes in the sand filter, due to the removal of suspended particles from the water and their accumulation in the pores, result in an increase of the bulk density and acoustic speed of the granular material. Consequently, the reflected acoustic response changes as the ...


    By IWA Publishing

  • PAMBuoy:Monitoring Beluga Whales in Alaska case study

    Real-time monitoring for beluga whales (Delphinapterus leucas) in the Eagle River, Alaska using a PAMBuoy detection system Real time monitoring for beluga whales (Delphinapterus leucas) in the Eagle River, Alaskausing a PAMBuoy detection system. Final Contract Report by SMRU, LLC and Marine Instruments Ltd. 19p. The Army and Air Force teamed with the Alaska Department of Fish and Game ...

  • Successful trunk main correlations in Australia, the land of long pipes - Case study

    The Aquasscan TM Successfully locates leaks at distances over 1KM in Sydney. The Gutermann Aquascan (Trunk Main) correlator provided a series of high performance correlations in trials performed in Sydney, Australia.  Sydney Water provided a 1.2 KM of 600mm OD Steel trunk main for a series of tests to be performed to evaluate the performance.  The testing was administered by ...


    By Gutermann AG

  • Application of a three-dimensional hyperbolic location system to the false killer whale (Pseudorca crassidens) depredation issue

    Depredation by false killer whale (Pseudorca crassidens) is a serious problem for pelagic longline fishing in the Coral Sea. These interactions have raised substantial ecological, economic and social concerns. McPherson et al. proposed post-processing of passive acoustic recordings to analyse general odontocete acoustic behaviour and assess the effectiveness of systems being developed to reduce ...


    By Inderscience Publishers

  • Keeping quiet about DCNS

    DCNS, one of Europe’s leading naval defence groups and contractor for integrated warships and systems, is a dedicated user of Brüel & Kjær sound and vibration solutions. This article, written with the support of DCNS, illustrate show PULSE™ is playing a central role at key DCNS operation centres in Northern France; helping with design, maintenance, acceptance testing ...

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