Case Studies

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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.

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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.

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石橋製作所は、風力発電用ギヤボックスの製造で多くの企業が直面する課題を抱えています。それは、顧客の投資に対する利益に重大な影響を及ぼす、信頼性と製品寿命の保証です。石橋製作所が使用するPuLseデータ収集システムとトランスデューサは、会社と共に拡張されるであろう総合試験スタンドの一部を担っています。

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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.

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Brüel & Kjær’s permanently mounted accelerometers were developed in close collaboration with AgustaWestland to monitor helicopter gearbox health on the AW139.

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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.

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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。

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.”

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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 of
Linamar’s products and automotive engineering solutions.

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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

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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.

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ディーゼルエンジンの音質を改善するために、いすゞ自動車はブリュエル・ケアーと共同で音質メトリクスマッピングを開発しまし
た。ラウドネスやシャープネス、ラフネスなど、音の知覚に基づいたパラメータ（音質メトリクス）を用い、音の特徴別に騒音源の
位置を特定できます。同時に、ディーゼルエンジンのどこから衝撃的な騒音が発生しているかを特定するために、「インパルシブネ
ス」の新しい計算アルゴリズムも開発しました。いすゞとブリュエル・ケアーのプロジェクトによって、ビームフォーミングと
SONAH（統計的最適化近距離場音響ホログラフィ）システムで使用できる、世界初の音質メトリクスマッピング用ソフトウェアが
誕生しました

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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.

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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.

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Lecture hall acoustics are essential for a positive learning environment. The essential goal of room acoustics is to ensure that every
seat is the best seat. This case study presents a comparison between measured and simulated acoustical parameters in a lecture
hall. The parameters validated were the reverberation time and the speech intelligibility. Brüel & Kjær’s ODEON version 10.0 was the
simulation software used to simulate the room and the results obtained at the midrange frequencies were within 5% of the measured
acoustical parameters. Large differences were found in the lower frequency range

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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.

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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.

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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.

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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

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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.

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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.

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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.

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Christie Digital Systems Canada Inc., manufactures cinema projectors and LED illumination display devices, and is a leader in visual solutions for world-class organisations, offering diverse applications for business, entertainment, and industry. Brüel & Kjær products, including the PULSE LAN-XI platform in conjunction with an LDS V875 shaker, are used as part of the stringent product testing regime to improve the design and performance of Christie’s projectors.

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Roxtec develops, manufactures and sells complete sealing solutions for cables and pipes. The Roxtec sealing system is based on Roxylon™ rubber modules with removable layers that enable a perfect fit for cables and pipes of different sizes. A PULSE LAN-XI system is used for internal R&D purposes, where Roxtec validates its existing seals and makes experimental tests on rubber. The portable LAN-XI and battery module also make the system perfect for on-site visits to customers.

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In order to improve the perceived sound quality of diesel engines, Isuzu cooperated with Brüel& Kjær to develop mapping of sound quality metrics, where noise sources can be identified based on their sound character, using perception-based metrics such as loudness, sharpness and roughness. Together, they also developed a new impulsiveness algorithm to clearly identify the source of impulsive noise in diesel engines. The result of the Isuzu/Brüel & Kjær project is the world’s first commercially available sound quality metrics mapping software for beamforming and statistically Optimal Near-field Acoustic Holography (SONAH) systems.

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Sound & Vibration Technology Ltd. (SVT), located on Millbrook Proving Ground in Bedfordshire, UK, is a provider of sound and vibration test-based solutions. Its relationship with Brüel & Kjær goes back to 2003. Recently, Brüel & Kjær cooperated on a testservices project that involved making measurements on a prototype Triumph motorcycle. The purpose of the measurements was to characterise certain operating vibration levels for subsequent component durability testing. Brüel & Kjær’s PULSE LAN-XI was used to collect all the measurement data that was then post-processed using PULSE Reflex Core.

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The West Toronto Diamond Project, a large construction project located in the community, initially failed to address community concerns over noise from piling activities. After investigation the regulatory authorities stipulated the piling technology that could be used in the future and imposed operational limits and reporting requirements that significantly increased costs and extended the project by three years.

If an active monitoring programme and a Web-based community engagement programme had been established prior to construction, complaints and the subsequent lengthy delays and cost overruns may have been avoided.

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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, Paul Goodes, says, "Partnering with Brüel & Kjær was the best choice for both companies because of our similar vision and goals".

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GE Healthcare Systems is one of GE Healthcare’s six primary units. Its industry-leading products are used for medical imaging and diagnostic purposes allowing clinicians to see inside the human body more clearly. Technologies include Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and Positron Emission Tomography (PET) covering a wide range of medical requirements. These provide health care workers with the solutions to enhance the efficiency of medical care. Brüel &Kjær applications are used almost exclusively for product R&D, product life cycle testing, durability, reliability and fatigue testing purposes.

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In order to achieve higher test efficiency, Renault needed to enhance its existing installed Brüel & Kjær system and reduce the time spent in the test cell. Renault wanted to ease the setup, data processing and measurement validation processes before activation of batch calculations. Another important requirement was a new reporting functionality. The overall objective was to simplify the workflow and calculations in the measurement process and thus decrease idle time when measuring according to a predefined procedure.

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ENMO was founded 14 years ago and has very successfully exclusively represented Brüel & Kjær in Belgium. Now, ENMO has become the exclusive distributor for Brüel & Kjær in the Benelux countries. Managing Director and founder of ENMO, Bart Dockx, is delighted, “With Brüel & Kjær, we can provide total solutions and we are a single point of contact”. He considers this to be a major advantage, “This plus ENMO’s commitment is the perfect combination and I like to use the expression that one plus one equals three”.

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Scuderia Ferrari was founded by Enzo Ferrari over 80 years ago in Modena. The original name is, still today, the name of the racing team division of Ferrari S.p.A.

Scuderia Ferrari recently invested in a 6-channel PULSE LAN-XI data acquisition system. This is mainly used for engine test bench balancing, a major issue when Ferrari’s Formula One engines run at up to 20000RPM.