Case studies describe how Brüel & Kjær products are used in real-life, based on one or more customers’ experiences.
Microsoft® has a vision to make our devices so effortless to use that they all but disappear. Since sound quality holds the key – and since their engineers always want the best equipment on hand – they have purposebuilt a series of anechoic chambers for testing, which include the quietest place in the world.
Chhatrapati Shivaji International Airport (CSIA Mumbai) applies a balanced approach for identifying and analyzing noise levels in order to reduce its impact on the surrounding community. The airport required a comprehensive system to monitor sound levels and report compliance with the latest national and international aviation legislation.
Ship noise affects the underwater environment, requiring acoustic assessment. Since Japan has no large-scale underwater ranging capability, JRC Tokki invested in a portable sound intensity system. This static ranging system uses hydrophones mounted on a floating raft to make underwater Noise Source Identification (NSI) measurements on large vessels.
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.
The Panum Institute Science Tower is a new construction development for the University of Copenhagen medical centre, to house an international biomedical centre, research and laboratory facilities. When the Environmental Impact Study for this large building project specified day- and night-time noise limits, the construction company turned to Brüel & Kjær.
Only in the final hot weeks of late summer do combine harvesters appear in the cornfields. To exploit every last minute while conditions are optimal, New Holland’s developers work hard to reduce the time spent driving between fields. By reducing the pass-by noise of the machines, they can gain a higher speed road speed rating – saving the drivers’ time.
AgustaWestland’s permanently mounted accelerometers were developed to monitor helicopter gearbox health on the AW139, in close collaboration with Brüel & Kjær.
Hearing loss at call centres is a major issue, from exposure to excessive and continuous high levels of noise. Using the latest technology, Professor Setsuo Maeda of Kinki University, Japan, has investigated the noise exposure risks and speech intelligibility of traditional headsets, and the latest bone-conducting devices.
After the helicopters of the Brazilian Air Force were modified to carry a variety of payloads, DCTA needed to assess their structural performance. By analyzing the structural dynamics both on the ground and throughout all flight conditions, DCTA informed the updating of the aircraft’s flight profiles – ensuring structural integrity in the field.
Top quality soldiers require the most realistic training possible. However, in Norway, the military’s exercise areas face environmental legislation that dictates noise limits the military must stay within. Therefore, to maximize their window of operations, they sought to map the noise of their military equipment.
Today, sound is being recognized more and more as an important parameter when defining product quality. With this in focus, Crown Equipment Corporation decided to explore how improving the sound of their forklift trucks could create a better product and, in turn, a more satisfying user experience.
RAL Space’s contribution to the new James Webb Space Telescope faced design and development timeframes that demanded ‘right first time’ engineering. High quality vibration testing is critical to assuring the structural quality of satellites, and since test objects were consistently increasing in size, RAL Space required a new vibration test system.
For identifying feedback in hearing aids due to leakage or vibration, a special turnkey solution using robot-controlled measurements and statistically optimized near-field acoustic holography (SONAH) has stabilized development time requirements and provided improved insights to build GN ReSound’s knowledge base.
For Manchester Airports Group (M.A.G), upgrading their noise management technology was a unique opportunity to optimize operations across its network of UK airports and build on its already impressive and well-established Corporate Social Responsibility programme.
When DCTA needed flight data from the VLS rocket, Brüel & Kjær sound and vibration sensors provided the input to the on-board telemetry system.
The military version of Airbus’s A330 needs to use civilian airports, where noise restrictions apply. After converting it into the military A330 MRTT, aerodynamic changes required new measurements of noise at approach, update the noise certification. With the support of Brüel & Kjær, Spain’s INTA conducted the measurements and analysis required.
To comply with environmental noise regulations, Newcastle International Airport Limited needed to manage and reduce environmental noise where necessary, and preserve the current noise level where it was already acceptable. NoiseDesk enabled them to do this efficiently whilst freeing staff for community engagement activities.
In the spiritual home of wind energy, Denmark, researchers try to understand how the forces of nature act on wind turbines. They find the structural resonances and understand how blades bend and twist in real, operational use – the modes. The real-world data feeds back into virtual design models, helping to improve them.
The entertainment industry is critical to the livelihood of Austin, Texas. Equally important is the quality of life for Austin’s residents. The city required a noise monitoring solution that would allow it to continue hosting major events while minimizing noise impacting neighbours.
To ensure the high performance of some of the most technologically sophisticated machines ever built, Lockheed Martin turned to Brüel & Kjær. In order to help protect ground crew working on aircraft carrier decks, Brüel & Kjær supplied a complete solution for acoustic characterization. Vibration test systems provided durability assurance and stress screening.
The City of Seattle received numerous complaints from neighbours near an urban recycling plant, but noise levels never breached regulations when measurements were taken. Seattle needed a short-term noise
monitoring service that collected data 24 hours a day to detect if acceptable levels were being exceeded so it could respond accordingly.
Redeveloping the historic Hollinger Mine into an open-pit operation at Porcupine Gold Mines has raised concerns about environmental impacts in the community of Timmins. Although mines have been operating for over 100 years in the area, close proximity to the city means a greater emphasis must be placed on mitigating the impacts on all stakeholders.
Vehicles that run on tracks present unique vibration challenges. To minimize the effect on the operator, the partners Brüel & Kjær and Sound Answers equipped and trained Bobcat to characterize the entire, finished vehicles in all their complexity. Correlating these results with their finite element models helps improve their designs.
Eurocontrol S.A. es una de las empresas líderes del mercado en el campo de la inspección, el control de calidad y la asistencia técnica en las áreas de Inspección Reglamentaria en Seguridad Industrial. Eurocontrol fue contratado por Acciona, líder en el desarrollo y gestión de infraestructuras y energía renovable, para controlar el ruido en una zona de construcción donde se necesitaba ampliar las operaciones en horario nocturno.
The European Union’s Environmental Noise Directive 2002/49/EC requires member states to create new noise maps every five years for large urban areas and major transportation sources. The English government decided to meet the requirements for the second round of noise maps by commissioning a single project to calculate sound levels across England. This resulted in the world’s largest noise map.
Eurocontrol S.A. is a market leader in inspection, quality control, testing and technical assistance related to the Regulatory Inspection industry. Eurocontrol was commissioned by Acciona, a leader in the development and management of infrastructure and renewable energy, to monitor noise at a construction site where it needed to extend operations into the night.
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.
Port Metro Vancouver sought to enhance community relations by better monitoring and managing its noise impact. As Canada’s largest and busiest port, it’s critical that it maintain maximum operations and business growth while transparently communicating and engaging with the public.
The sound quality of home appliances is a critical competitive factor. In addition, white goods manufacturers must measure the sound levels of their appliances to the relevant standard. When investigating sound sources was taking too much time in their busy anechoic chamber, Gorenje looked to increase efficiency with a quicker characterization system.
Ferraris are distinguished by a unique sound that is as carefully tuned as a piece of music. Creating their thrilling sound authentically and yet keeping it within legal limits requires careful component design and selection. This is eased by virtual evaluation of alternative design decisions in an interactive, free-driving scenario.
The acoustic range at Heggernes, near Bergen, is used for measuring noise from all types of NATO naval vessels. Some civilian owned ships are also tested. The equipment used for testing must be totally accurate and reliable – Brüel&Kjær products were chosen for their accuracy, ease of use and reliability, and the acoustic range uses a wide variety of Brüel&Kjær products including a PULSE™ Multi-analyzer, other types of analyzers, customised software, power and conditioning amplifiers, sound level meters and transducers.
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.
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.
DLR is Germany’s national research centre for aeronautics and space. Their Experimental Methods department set out to investigate noise transmission and propagation on the Airbus A320 family of aircraft. Brüel & Kjær’s multi-field microphone measured the uncertain sound field inside the aircraft cabin, and between the fuselage and the lining.
A project to modernise Twickenham railway station before the 2015 Rugby World Cup faced neighbours who are sensitive to noise. An outsourced monitoring solution ensured legal compliance and provided a web-based interface. Sharing data with the community and construction company built trust, reducing complaints and helping to avoid delays and fines.
Noise monitoring does not require a large amount of expertise or investment in expensive equipment. DELTA learned how measurement projects with high technology demands could easily be solved with a Noise Sentinel On Demand subscription.
Tomingley Gold Operations (TGO) needed to control their noise impact on the nearby community of Tomingley. The mine has great focus on keeping a good relationship with their neighbours and noise control is a prerequisite for obtaining and keeping their Project Approval License. TGO is using Noise Sentinel for 24/7 noise monitoring and management, in combination with a remotely located, independent noise consultant.
Airbus Helicopters needed highly robust, flight-certified accelerometers for permanent monitoring of helicopter gearboxes to be quickly designed and delivered.
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.