Case studies describe how Brüel & Kjær products are used in real-life, based on one or more customers’ experiences.
Airbus Helicopters needed highly robust, flight-certified accelerometers for permanent monitoring of helicopter gearboxes to be quickly designed and delivered.
Growing consideration of the environmental impacts that underwater noise can have makes assessing the noise characteristics of ships a necessary part of their development. Since Japan has no largescale acoustic underwater ranging system, JRC Tokki invested in a portable sound intensity system that enables field measurements to be made on large vessels. This static ranging system uses technology that benefits from decades of successful use in the automotive industry, and applies it to underwater use. It uses hydrophones mounted on a floating raft to make underwater Noise Source Identification (NSI) measurements.
In Spring 2013, the Head of Brüel & Kjær Field Service, Falk Uschner, and VTS Product Manager, Ole Thorhauge, visited TÜV SÜD Product Service GmbH in Mannheim, close to Frankfurt, Germany. The purpose of the visit was to gain insight into the challenges and routines of a dedicated test house that provides services for all world-leading German automotive OEMs and their sub-suppliers. The Brüel & Kjær team wanted to gain a deeper understanding of what the present and future requirements are for class-leading vibration test equipment with respect to its use, functionality and services.
Project C501 Moorgate Shaft is part of the Crossrail infrastructure project that will create a new rail link across London from west to east. Over 42km of underground tunnels will link London’s main business centres in a project that is expected to start operation in 2018 and be fully operational in 2019.
Brüel & Kjær worked closely with the project team to implement Noise Sentinel, a robust and effective system for managing the noise impact of construction. Noise Sentinel has continuously monitored noise around the site since November 2011 and has exceeded both the expectations of the City of London and the contractual requirements of Crossrail. The main contractor, BAM Nuttal Kier JV, has been awarded Crossrail’s Green Line Scheme award for the project. In addition, Noise Sentinel has been shortlisted for the Environmental Initiative of the year at the 2013 International Tunnelling Awards.
Brazil’s space research organisation INPE provides satellite testing services to domestic and international agencies. Brüel & Kjær has provided INPE with a complete satellite vibration test system which was delivered in two stages: first the installation of two LDS electrodynamic shaker systems, and then integrating an advanced data acquisition, recording and analysis capability. This case study focuses on the second stage of installation. This includes a complete suite of test and analysis applications for acoustic fatigue, transient, random, and swept-sine vibration testing, and multiple user-interfaces. The result is a complete, comprehensive system from a single supplier, who also provides ongoing support in the form of servicing, updating and local calibration.
The Panum Institute Science Tower is a new construction development for the University of Copenhagen medical centre. Covering 38,000 sq. metres, the development will house an international biomedical centre, research and laboratory facilities. Construction work commenced in August 2012 and is expected to be complete in early 2015, at a cost of €180M.
Noise from construction work in built-up areas always presents the challenge of avoiding annoyance to the many people who can be affected. When the Environmental Impact Study (EIS) for this large building project in Denmark’s capital specified day- and night-time noise limits, the construction company turned to Brüel & Kjær. Like many construction companies, MVZ Byggepladsservice had no noise competencies, and required a complete subscription service where Brüel & Kjær delivered comprehensive, real-time noise information.
The Taiwan Electric Research & Testing Center (TERTEC) is developing test standards for new wind turbines. As these are produced at an increasing rate in Taiwan, and mainly for export, TERTEC is expanding its testing services to meet the standards of international trade partners. TERTEC plans to increase its competences to include test services, design recommendations, and accreditation, by acquiring more Brüel & Kjær solutions.
Maritime defence company DCNS is one of Europe’s largest shipbuilders, building submarines and other naval vessels for which stealth is important. Consequently, they have to measure and process a huge amount of sound and vibration data using PULSE systems, and share it throughout their large organisation. Time is always a pressing factor, especially during costly sea trials, so they format tests for easy operation by operators who are unfamiliar with PULSE, designing customised GUIs for specific applications. The PULSE measurement and analysis platform and PULSE Data Manager have revolutionised the speed and ease with which they can perform tests, and share and compare data across the entire organisation.
ACCIONA Infrastructure is ranked among the leading construction companies in the world, and is recognised for implementing the most advanced and innovative techniques and technology. R&D is vital to keep the company at the cutting edge, and in relation to technological developments ACCIONA Infrastructure created a team to analyse noise and vibration. Where traditional acoustic isolation calculation methods show important deviations, ACCIONA Infrastructure’s research is improving results by refining the methodology, and ultimately improving building designs.
The Clemson University International Center for Automotive Research (CU-ICAR) in South Carolina, USA, is aiming to become the premier automotive and motorsports research and educational centre in the world. In 2012, as part of their ambition to connect with industries also based in South Carolina, CU-ICAR built a Component Testing Laboratory to perform durability and validation testing for BMW and their suppliers, as well as other vehicle manufacturers. By paring the needs of automotive companies with the research of their students and faculties, CU-ICAR is assisting mutually beneficial development.
Hearing loss at call centres is a major issue all around the world. Exposure to excessive and continuous high levels of noise can result in both temporary and permanent hearing damage. Professor Setsuo Maeda of Kinki University, Japan, has unique experience and expertise in this area, and has carried out research at a small call centre on the Japanese island of Okinawa. Using the latest technology, Dr Maeda has compared the noise exposure risks and speech intelligibility of traditional headsets with the latest bone-conducting devices available.
Brüel & Kjær’s LDS shakers and vibration test systems are designed and built with a unique blend of global experience, the latest advanced technologies, and a highly motivated workforce that prides itself on making the best vibration test systems in the world.
Ishibashi faces a familiar challenge in manufacturing wind turbine gearboxes – ensuring the reliability and longevity that is critical to their customer’s return on investment. The PULSE data acquisition systems and transducers Ishibashi uses are part of a comprehensive test stand setup that is ready to expand with the company.
Brüel & Kjær’s permanently mounted accelerometers were developed in close collaboration with AgustaWestland to monitor helicopter gearbox health on the AW139.
When Brüel & Kjær needed assistance during the beta development phase of the post-processing platform PULSE Reflex, getting Continental’s input was a high priority. For Continental AG’s NVH Engineering department it was an opportunity to ‘try before you buy’, so they set about comparing the results between their existing PULSE LabShop real-time analysis platform and the new post-processing platform PULSE Reflex – which turned out to be even better than they expected.
ノイズスコープ（PULSE ベースビームフォーミングシステム）は、道路交通騒音の影響を受ける地域の騒音を測定するために、株式 会社高速道路総合研究所（NEXCO 総研）のご要望を満たすように、車載できる可動式の特注アレイを含めて納品されました。その 測定対象は、住居地域、橋梁、インターチェンジ、合流、トンネル、料金所などです。ノイズスコープを使用することによりNEXCO 総研は、交通量の増加に伴う厳しい影響を低減させるために、高速道路とその付帯設備の設計及び建設を最適化させることが可能と なります。
With component production facilities around the world contributing to the manufacture of exacting measurement equipment, Brüel & Kjær needs detailed and strictly centralised control of production test targets. When a new system was called for to maintain R&D targets in production by tracking and analysing test outcomes around the world, we decided to build our own.
EEI advises companies on how to fulfil government standards for consumer electronics, helping companies selling into the Thai market and helping Thai businesses exporting to Europe and around the world. They do this through consulting, training and seminars, and performing testing services that include sound power and electromagnetic compatibility.
For identifying feedback due to leakage or vibration in hearing aids, a special turnkey solution using robot-controlled measurements and Statistically Optimised Near-field Acoustic Holography (SONAH) has stabilised development time requirements and provided improved insights to build GN ReSound’s knowledge base.
A Desktop NVH Simulator has vastly improved Commercial Vehicle Group’s customer relations and jury testing capabilities. The simulator was the latest addition to their range of Brüel & Kjær products that began when their R&D facility was commissioned in 2008. Back then, when it came to setting up a new lab, the combined experience of their commercial and construction vehicle experts led them to choose Brüel & Kjær to provide the equipment they need for world-leading NVH development of their automotive solutions.
In 2007 Global Renewables was awarded a contract worth £2bn over 25 years to process the household waste of 1.4m people in Lancashire in the North of England.Driven by the increasing costs and environmental damage of landfill, the contract required building two waste recycling facilities at Farrington and Thornton at a cost of £125M together. Each facility converts 530,000 tonnes of household waste into high quality compost per year.Whilst the sites were located away from densely populated areas and intended to operate 24 hours per day, environmental issues around odour, air quality and particularly noise were key concerns to local residents.As a consequence noise limits were agreed and form part of the operating licence for each plant.
Ensuring the reliability of heating and refrigeration circuits, the Valliant Group’s Center of Competence uses vibration diagnostics to understand and predict damaging resonances in systems and components such as piping and compressors.
Pusarpedal is an environmental laboratory under the Indonesian Environment Ministry, performing environmental quality testing and monitoring. It also verifies data from other laboratories and works to develop environmental laboratories at the provincial level.
The Sound Answers/Brüel & Kjær partnership started in November 2006 when Sound Answers selected Brüel & Kjær as its hardware and software strategic partner. Sound Answers wanted to partner with a software/hardware manufacturer in the sound and vibration domain through which they could offer their services while enabling the partner to provide total solutions to customers. Brüel & Kjær was chosen for its test focus, reputation, best-in-class products, sales network, its strength in all its relevant markets and, most importantly, the management vision to provide a complete solution by leveraging consulting for pull-through product sales. Sound Answers President, Dr. Gabriella Cerrato, says, “Partnering with Brüel & Kjær was the best choice for both companies because of our similar vision and goals.”
Linamar’s more than 45 years of experience as a manufacturer of precision metallic components and systems for the automotive industry has served them well. As a manufacturer and supplier of highly engineered solutions for the automotive market their design and manufacturing base numbers 39 plants and some 17000 employees worldwide. Based in Guelph, Ontario, Linamar is one of Canada’s largest automotive parts company. Linamar has partnered with Brüel & Kjær and works closely with us in the development ofLinamar’s products and automotive engineering solutions.
Carlisle Interconnect Technologies - a wiring and aerospace component manufacturer - has benefitted greatly from its new range of testing capabilities after investing in a vibration test system, the engineering team at . As well as performing demanding tests for many engineers working in their group, they are now able to offer testing services for affiliated external companies
Noise Scope, a PULSE-based beamforming system that includes a portable half-wheel array, was delivered to Nippon Expressway Research Institute Company Limited (NEXCO RI). This customised beamforming solution is used to measure noise in areas affected by traffic and road noise. These include residential areas, bridges, intersections, junctions, tunnels and motorway tollbooths. As a result, NEXCO-RI can optimise the design and construction of highways and their facilities to reduce the adverse effects of highdensity traffic.
Using a simulator is unusual for a tier-one automotive supplier and helps to both develop components to exacting specifications, and communicate with customers throughout the development process.
Volvo is increasingly moving its Noise, Vibration and Harshness (NVH) development into computer simulation and modelling, with less traditional prototyping. A well-established customer of Brüel & Kjær, Volvo benefits greatly from the value added to their systems in terms of the minimised downtime, optimised functionality, and assistance with new applications - thanks to their PULSE Software Maintenance and Support Agreement.
Lecture hall acoustics are essential for a positive learning environment. The essential goal of room acoustics is to ensure that everyseat is the best seat. This case study presents a comparison between measured and simulated acoustical parameters in a lecturehall. The parameters validated were the reverberation time and the speech intelligibility. Brüel & Kjær’s ODEON version 10.0 was thesimulation software used to simulate the room and the results obtained at the midrange frequencies were within 5% of the measuredacoustical parameters. Large differences were found in the lower frequency range
Continuing a long tradition of using Brüel & Kjær equipment, Burke E. Porter supplies their wind turbine gearbox test stands with PULSE Data Acquisition Hardware and PULSE software built in, as well as the associated transducers and cabling. In this way, they incorporate the complete sound and vibration testing solution from Brüel & Kjær into a cohesive system that tests wider parameters.
Quality requirements for wind turbine components are high, especially for gearboxes. Nanjing High Speed Gear Manufacturing Co has implemented very stringent requirements – from materials to production – to ensure the highest product quality for its customers.NGC and Brüel & Kjær have worked together since 2006, and NGC has used Brüel & Kjær’s PULSE Data Acquisition and Analysis platform for a range of applications ranging from R&D, quality control, production testing and validation to field measurements.
Environmental issues, particularly the impact of aircraft noise, comprise the most significant constraint on the growth potential of attractive airport businesses. The proactive use of impact reduction approaches has resulted in significant outcomes for many airports and remains an important part of any balanced programme, however the increasing use of sophisticated tolerance-building initiatives is heralding the arrival of the new, collaborative, fourth generation aviation airport environment management.
The automotive glass subwoofer technology has been in the development stage for a few years now. Read how The University of Windsor, using Brüel & Kjær hardware and PULSE software, including Reflex, has played an integral role in its development
The Department of Aerospace Science and Technology (DCTA) is the Brazilian national military research centre for aviation and space flight. DCTA is subordinated to the Brazilian Air Force and coordinates all technical and scientific activities related to the aerospace sector. Noise and vibration testing play a vital role in many phases of operations and DCTA benefits from Brüel&Kjær’s complete measurement solutions. They have a large installed base of Brüel&Kjær products ranging from shakers for environmental and structural testing, noise and vibration sensors for a wealth of applications from rugged flight-testing to highly sophisticated laboratory use, multichannel data acquisition and analysis platforms, and an enormous range of noise, vibration and shock software application packages.
The Brazilian Air Force tasked the IAE division of the Department of Aerospace Science and Technology (DCTA) with testing and validating the impact of modifications made to a medium-weight, multi-purpose helicopter – modifications that could potentially influence both the structural and aerodynamic behaviour of the helicopter. Using Brüel & Kjær’s PULSE data acquisition and analysis platform, Operational Modal Analysis (OMA) was carried out on both the modified and unmodified helicopter during on-ground and in-flight tests. These tests made it possible to identify any critical modes that would significantly influence the structural and aerodynamic behaviour of the helicopter with consequential maintenance and safety issues.
Brüel & Kjær is working closely with the Institute of Aeronautics and Space (Instituto de Aeronaútica e Espaço, IAE) division of Brazil’s Department of Aerospace Science and Technology (DCTA) to deliver a range of sensors and airborne amplifiers to provide critical flight data for their on-board telemetry system for the VLS-1 satellite launch vehicle program. The VLS-1 rocket is designed to launch small satellites with payloads ranging from 100 – 380 kg for equatorial circular orbits and 75 –275 kg for polar circular orbit.