Brüel & Kjær is a world leader in sound and vibration measurement, supplying comprehensive solutions for noise and vibration testing. The document provides an overview of Brüel & Kjær's products and solutions for various industries including automotive, aerospace/defense, telecom/audio, and urban/industrial noise management. It highlights their focus on innovation, quality, and providing complete testing solutions through an integrated measurement chain and global support services.

1. Brüel & Kjær
Products and solutions overview

2. Brüel & Kjær
The ComPany
Brüel & Kjær Sound and Vibration measurement a/S is a world leader in The CompleTe soluTion innovaTion QualiTy 2 rüel & Kjær – The Company
B
www.bksv.com
sound and vibration measurement and analysis, supplying a comprehensive We are unique in the industry in pro- We thrive on innovation. Our phi- The valuable knowledge and expertise
4 esT suiTes for
T
range of advanced solutions. Since the 1950s, Brüel & Kjær products have ducing all of the elements for complete losophy of incorporating the latest we have gained over the years has
aerospaCe, spaCe and
sound and vibration test systems. Our technological advances in our products given us a reputation for superlative
proudly set the standard to which others are compared. defenCe soluTions
goal is to create the most technologi- attracts talented engineers and design- reliability and quality. We stringently www.bksv.com/Aerospace
cally advanced components, built to ers from all over the world to work on maintain this by thoroughly testing our
the highest quality and designed to new product developments. For nearly products, systems and solutions in harsh 6 uTomoTive /
a
ground vehiCles
save time and eliminate errors in the 70 years we have been an industry pio- environmental conditions. Our status www.bksv.com/Automotive
measurement process. We have an neer, collaborating closely with custom- as an ISO 9001-certified company gives
unequalled product range, but our real ers and partners to develop innovative our customers the peace of mind that 8 eleCom and audio
T
w
ww.bksv.com/TelecomAudio
advantage lies within our ability to sup- methods of solving their noise and extremely high standards are met in all
ply a complete solution. vibration measurement challenges. aspects of our products and services.
10 ound and viBraTion
s
in The environmenT
Not only do the individual compo- Many of our research and development www.bksv.com/ENV
nents meet the highest performance personnel are recognised global experts our heriTage
standards in the industry, they are also in their fields and are regularly invited 12 rBan and indusTrial
u
Brüel & Kjær was founded by Per V. Brüel noise managemenT
designed to interact and communicate to speak at conferences, advise on new
and Viggo Kjær on November 28, 1942. www.bksv.com/UrbanNoise
with each other to provide unrivalled standards and write industry papers.
measurement security and user feed- They also teach at our Brüel & Kjær In 1943, Brüel & Kjær entered the vibra- 14 irporT environmenT
a
Brüel & Kjær offers the largest selection of
back. This allows us to create solutions University in Denmark, and at regional managemenT
measurement microphones in the industry tion measurement market by launching
www.bksv.com/AirportNoise
that are targeted at optimising our training centres around the world. the world’s first charge accelerometer.
customers’ work processes, to provide Then, Sound Level Recorder Type 2301 16 sTruCTural analysis
rapid, reliable results. was introduced in 1949, which went on www.bksv.com/StructuralAnalysis
gloBal and loCal
to become probably the most impor-
We have a high output of new products 18 oise sourCe idenTifiCaTion
n
We have the largest sound and vibra- tant instrument for acoustical measure- www.bksv.com/NSIArray
and accessories designed to improve
tion sales and support network in the ments for half a century.
our customers’ test processes, but we
world, and regularly hold local courses 20 viBraTion TransduCers
also have a reputation for continu- It is unique in the industry that you can www.bksv.com/VibrationTransducers
and roadshows to facilitate continual
ing to support older products. Due to source all measurement chain compo-
dialogue with our customers. With 22 aCousTiC TransduCers
the high manufacturing quality of our nents from one partner, a position we
more than 90 sales offices in 55 coun- www.bksv.com/Microphones
hardware, many 30-year-old products lately consolidated by the acquisition
tries and a global network of engineers
are still in service today that we still of LDS Test and Measurement, making 24 viBraTion TesT sysTems
to advise on measurement and analysis
repair and calibrate in our service de- us the market leader in vibration test www.bksv.com/VTS
problems, we can help you no matter
partment when the need arises. solutions.
where you are. 26 ulse lan-Xi
p
analyzer plaTforms
More recently, Australian company
In addition to specialist training, our www.bksv.com/LANXI
Lochard was acquired, and we can now
unrivalled support services include
provide customers with world-class 28 pulse sofTware
installation, software updates, calibra-
urban, industrial, and airport environ- www.bksv.com/PULSE
tion, planned maintenance, repair and
ment management solutions.
rental. 30 serviCe and supporT
Our world-leading experts provide a www.bksv.com/Service
comprehensive global support service
2

3. TeST SuiTeS for
aeroSPaCe, SPaCe and defenCe SoluTionS
ever-shortening design and development timeframes of modern aerospace aCousTiC TesT suiTe environmenTal TesT suiTe roTaTing TesT suiTe sTruCTural TesT suiTe
and space programs demand ‘right-first-time’ engineering. The aerospace Whether your interest is exterior or Reproducing realistic operational Vibration analysis of rotating machin- Structural dynamics testing is vital to
sector is seriously contemplating aviation efficiency and environmental interior noise, our acoustic test suite conditions in the laboratory is essential ery provides valuable information on understand and optimise the inherent
provides data acquisition and assess- for qualifying the real-life integrity of engine health, reliability and perform- dynamic properties of structures, to
issues, whilst defence industries have the added concerns of ensuring
ment systems to combat your noise structures to ensure durability. Whether ance. From R&D and production test- ensure reliable and safe operation. Our
reliability and high performance of military systems, often under extreme problems by optimising noise perform- for billion-dollar satellites, launchers, cell applications to on-ground main- structural test suite offers complete
conditions. ance, improving sound quality, and aircraft, instruments or structures, our tenance, our vibration measurement systems for controlled excitation test-
ensuring compliance with environmen- comprehensive vibration test solutions and analysis systems provide you with ing, real-life operational testing and
recognising that high quality, goal-focused, time- and cost-efficient tal legislation. provide a wealth of environmental test powerful machine analysis tools. test-FEA integration – from the smallest
systems. components to the largest assembled
testing is critical to meeting program milestones, Brüel & Kjær addresses f Noise source mapping and location f ibration analysis, monitoring and
V
structures.
today’s engineering needs by providing user-friendly and seamless noise f Wind tunnel and flight testing
f urability and acoustic fatigue
D diagnostics
testing f perating Deflection Shapes
O
and vibration testing, analysis, data storage and reporting capabilities. f ibration data acquisition and
V
f Engine and aircraft certification analysis
f lassical and pyro shock
C analysis in engine test cells
f Acoustic material testing f Operational Modal Analysis
f ine, random, sine-on-random,
S f n-ground vibration check of air-
O
f abin comfort and occupational
C random-on-random testing craft engines f Classical Modal Analysis
health
f Shock response spectrum f Order analysis and autotracking f Normal mode testing
f Ramp noise and sonic boom
f Kurtosion f Balancing and trim balancing f Structural dynamics modifications
f Underwater acoustics
f ield data replication
F f HUMS transducers f Model correlation and updating
f coustic stealth and noise signature
A
management
Distributed and rack-mounted
LAN-XI data acquisition system
Image courtesy of Rolls-Royce Plc.
Acoustic and vibration sensors
Satellite vibration and shock testing with LDS PULSE LabShop used for real-
V984 vibration shaker and PULSE Reflex Shock time and post-processing
Response Analysis analysis
4 Image copyright: Westland Helicopters Ltd www.bksv.com/aerospace 5

4. auTomoTiVe / ground VehiCleS
Passenger vehicles such as cars, trucks, motorcycles, buses and trains con- inTerior nvh sTruCTural analysis powerTrain TesTing
tinuously need to be more exciting and pleasant, while becoming safer and The Source Patch Contribution (SPC) The Structural Dynamics Suite helps B
rüel & Kjær provides tools for ef-
emitting less noise. This makes noise, Vibration and harshness (nVh) testing system covers the entire measurement improve the dynamic behaviour of any ficient powertrain testing:
chain from transducer to the final structure. It includes Operating Deflec-
a key to competitive advantages for vehicle manufacturers. f ery high-temperature triaxial
V
analysis platform, allowing engineers to tion Shapes analysis covering the full
accelerometers
analyse structural and airborne contri- set of methods (frequency, order, time), PULSE Reflex Modal Analysis –
Brüel & Kjær’s expert knowledge of the industry, combined with extensive complete structural analysis solutions
butions in vehicles, and even tune their Classical Modal Analysis with a wide f Crankshaft angle analysis software
with results you can trust
experience of customer-driven projects, allows us to cover the whole vehicle sound and vibration characteristics. range of powerful curve-fitters, and
f ystems for measuring sound power
S
nVh development process. our solutions range from vehicle nVh simulators Operational Modal Analysis.
versus RPM
to target setting, to spherical beamforming for 360-degree noise mapping. wind Tunnel TesTing f olography systems for locating noise
H
sQueaK and raTTle sources and measuring partial sound
Surface microphones on the exterior
power versus RPM and crank angle
of a vehicle measure the pressure Our unique equipment range ensures
fluctuations at different positions, that automotive components and inte- f ide band noise source identifi-
W
whilst beamformers placed outside the riors are durable and free from noise, cation systems customised to fit
main airflow pinpoint the location of and supports industry-standard QA engine test cells
noise sources and quantify the relative practices for squeak and rattle vibra-
f VH simulators to evaluate power-
N NVH desktop simulator helps you
noise contributions. When combined tion testing.
train components or complete evaluate the sound before you build
with a spherical beamformer inside the the vehicle and design the sound
f Low noise shaker systems powertrains in full vehicle context
vehicle, a detailed noise cause-effect of the vehicle to meet brand and
relationship is achieved using minimal hybrid-electrical and electrical vehicles: customer expectations
f Sound quality analysis software
testing time.
f rray-based systems for quick
A f witching noise analysis, transient
S
localisation of noise sources analysis, high-frequency beamform-
Our flagship test centre near Detroit is a state-of-the-art
test facility that includes a hemi-anechoic four-roll chassis ing, multi-field microphone with
engineering serviCes
dynamometer very low magnetic sensitivity for
We provide a wide range of engineering sound engineering measuring in unknown sound fields
services to improve products or execute
The NVH Simulator Suite auralises NVH f VH simulator for exterior
N
complete development programmes, in
data with advanced sound-simulation vehicle noise
cooperation with global partners.
techniques, allowing you to efficiently
communicate NVH targets to non- f ibration testing of
V
experts even before physical prototypes large batteries
eXTerior noise
are available. The on-road simulator Moving source beamforming
As community regulations put ever- used to pinpoint noise sources
allows evaluation of virtual vehicles,
on high-speed trains
tighter restrictions on noise emission, and even benchmarking of competitive
our Vehicle Pass-by solutions offer vehicles under real driving conditions.
complete support to ensure compliance
with the latest standards.
Adding moving-source beamforming
enables noise source localisation and
troubleshooting during measurements.
Battery testing for hybrid
Our Indoor Simulated Pass-by Noise electrical vehicles with
System enables efficient comparison of lifetime simulation of the
car and its subcomponents
design alternatives.
6 www.bksv.com/automotive 7

5. TeleCom and audio
acoustic performance has become increasingly important as users demand
high quality audio in every situation, whether this concerns handsets,
headsets, loudspeakers, hearing aids, microphones, or any other device
reproducing music or transmitting speech.
Brüel & Kjær has a long tradition of close connections with the fields of eleCTroaCousTiC audio analyzers TransduCers
telecommunications and audio, pioneering many methods that are now TesT sysTems
With PULSE being one of the most com- To guarantee reliable acoustic meas-
standard practice all over the world. Our experience of providing quality monly used platforms for conducting urements, most national standards
acoustic solutions gives us a solid back- acoustic measurement, it forms a solid laboratories use Brüel & Kjær refer-
Today, based on our accumulated knowledge and experience, we offer a ground when developing new systems foundation for our audio analyzers. ence microphones. Consequently, most
for emerging technologies and markets. These offer a variety of analysis meth- acoustical measurement in the world An extensive range of vibration
variety of electroacoustic test systems, audio analyzers, and transducers for shakers accommodates everything
Our range of dedicated electroacoustic ods, covering traditional sine testing ultimately refers back to Brüel & Kjær
electroacoustic applications. from evaluating printed circuit card
test systems is eminently suitable for (using SSR and TSR), spectrum analysis products. construction to examining package
acoustic design, benchmarking, pre- (using FFT and CPB) for testing using materials
Our range of acoustical transducers
qualification and conformance testing real speech, and perception-based test
includes ear simulators, mouth simula-
of mobile phones, tablets, VoIP phones, methods.
tors and microphones. All transducers
headsets, loudspeakers, etc.
In combination with the dedicated supplied by Brüel & Kjær contain infor-
The test system supports the entire hardware, this supports the audio en- mation about their actual sensitivity.
workflow required by typical test gineer in achieving the acoustic design When the transducer is connected to
procedures. This covers system calibra- goals setup. Besides its measurement the analyzer this information is auto-
tion and verification, various acoustic and analysis capabilities, PULSE also of- matically transferred to the analyzer,
measurement suites for evaluating the fers tools to automate test procedures, ensuring that the proper setting is
performance of devices under testing, as well as reporting and data man- always used for the specific measure-
and reporting. Tools for easy compari- agement tools for easy archiving and ment task.
PULSE LAN-XI data acquisition
son of measurements as well as tools retrieving of measurement data and
hardware constitutes a high
to hear and edit recordings are also related information. quality, state-of-the-art platform for
available. electroacoustic measurements
PULSE LabShop and PULSE Reflex
offer various software packages for
dedicated electroacoustic applications,
as well as general acoustical and
vibration analysis
A comprehensive portfolio of transducers supports standardised
testing of telephones, hearing aids, headphones, headsets, ear
phones, loudspeakers, receivers and many other applications
8 www.bksv.com/Telecomaudio 9

6. Sound and ViBraTion in The enVironmenT
Sound and vibration in the environment comes from a variety of sources environmenTal noise hand-arm and sound insulaTion room and offiCe
such as industrial plants, road and rail traffic, construction work and whole-Body viBraTion in Buildings aCousTiCs
The tasks involved in managing envi-
aircraft. add to these sports events, outdoor concerts, leisure parks and ronmental noise are many and varied Human vibration is defined as the Building acoustics is the assessment of The way sound is created, propagated,
– from solving noise complaints to effect of mechanical vibration on the sound insulation in buildings and their perceived, measured and modelled
domestic situations to name but a few, and you have many different
noise mapping, and from policing noise human body. The effect might be on component elements. The acoustics of inside an enclosed space is called ‘room
sources of sound and vibration, each with different characteristics that limits to noise abatement and zoning. the body as a whole, or on parts of buildings are important for the well- acoustics’. Enclosed spaces include
pose specific problems for the professionals who assess them. Reports must be made and all data, the body – of which the hands and being of people in their homes, work- dwellings, offices, workshops, factory
results, reports and analysis must be arms are the most important and most places or public venues, and minimum halls, lecture rooms, auditoriums, con-
With our broad range of sound level meters and hand-held analyzers, Brüel safely and intuitively archived. frequently affected. Hand-held power standards are consequently enshrined cert halls and transportation terminals.
tools such as chisels, drills and pressure in the building regulations of most
& Kjær offers systems to cover all eventualities from level checks to in- A wide range of tools are available Acoustic measurements are used to
hammers, expose the user to dangerous countries.
depth analysis, and from measurement to post-processing and reporting. from Brüel & Kjær to help in the
vibration.
validate new constructions and to
various tasks involved in managing en- Building acoustic measurements are troubleshoot existing ones. Reverbera-
vironmental noise, from simple sound The relevant international standards used to validate new constructions and tion time is the single most important
level meters to permanent noise moni- involve measurements of whole-body to troubleshoot existing ones. Proper parameter used to describe room
toring stations, from post-processing vibration and hand-arm vibration using measurement of minimum require- acoustics, but in addition, parameters
software to noise mapping software, instruments such as Type 4447 that ful- ments should fulfil relevant standards, describing music quality and speech
and from advanced analysis tools such fil the requirements of the standards. such as ISO 140. intelligibility are important.
as sound intensity or narrow-band
For modelling the acoustic perform-
analysis to centralised noise monitoring
ance of a room or hall, Brüel & Kjær
software.
provides software that simulates the
interior acoustics of buildings, allow-
noise aT worK ing reliable predictions and simulation
of the subjective response in modest
Occupational health, safety and com-
calculation times.
fort are major concerns throughout the
world, and measures have to be taken
to minimise the risks in the workplace.
Millions of people suffer from noise-
ODEON Type 7835
induced hearing loss (NIHL), resulting Triaxial hand-arm room acoustics modelling software
in a reduced quality of life. Hearing vibration measurement
protection programmes have been
implemented in most countries, and
are governed by international and na-
Type 2270-based
tional standards. Any such programme Building Acoustics System
involves an assessment of the noise
problem using hand-held sound level
meters and personal noise-dose meters.
Sound Level Meter and Hand-held
Analyzer Type 2270 with Sound Level
Calibrator Type 4231
10 www.bksv.com/env 11

7. urBan and induSTrial
noiSe manage menT
effective management of environmental noise is a major public concern noise senTinel noise moniToring noise prediCTion
that consists of a complex set of issues that need to be dealt with ef- Terminals sofTware
Takes away the headache of reporting
ficiently. Whether you are in an industry with an obligation to show noise noise compliance Brüel & Kjær has a wide range of Whether assessing the noise impact of
noise monitoring terminals covering new developments, developing noise
limit compliance, or a local authority with a need to show your community Noise Sentinel takes care of all aspects
permanent installations, mobile units maps over larger areas, or investigat-
of operating a continuous noise
that noise is under control, our solutions will do the job. and portable solutions, to enable ing noise emission in complex outdoor
monitoring programme. The complete
you to measure and record data over acoustic environments, software that can Outdoor
service takes care of installation and
Brüel & Kjær’s state-of-the-art environmental noise management solutions extended periods of time – without calculate the noise impact is an essential Microphone
ongoing operation, delivers the noise Type 4952
enable efficient adherence to legislation such as the eu environmental compliance information you need
being physically present. Each instru- tool to underpin decision making.
ment fully meets all relevant interna-
noise and iPPC directives, and accordance to good practices and standards rather than the headache of operating Brüel & Kjær has been at the forefront
tional standards, and is built to operate
such as iSo 1996 covering environmental noise assessment. acoustic instrumentation. This simpli- of noise prediction software for 15
continuously in harsh outdoor environ-
fies the task for you, delivers a higher years, with products that meet the dif-
ments for long periods with high up-
Brüel & Kjær’s experience of more than six decades monitoring noise in a quality result in a more cost-efficient fering needs of both local authorities
time, ensuring completeness of data.
manner. and research applications.
huge variety of locations is a huge benefit for our customers. our systems
are designed to operate continuously for many years, and help to improve Managing noise is also about commu- Predictor-LimA Type 7810 is intuitive
nication, and with tailored graphical and simple to use, yet provides the most
the urban environment.
output and public web displays, Noise comprehensive feature and calculation
Sentinel delivers here too. set of any noise modelling package
available. Suitable for predicting noise
from single sources as part of a plan-
ning application, through to multiple-
source city noise maps featuring 3D
noise presentation and integration with
Geographical Information Systems, Pre-
dictor-LimA is the only tool you need.
Noise Sentinel Type 7871 Predictor-LimA™ Type 7810
provides high quality results, Intuitive, powerful and modern, making
simplifies your business, and environmental noise calculation easier.
simplifies your finances Calculate and analyse noise from various
noise sources such as industry or traffic.
12 www.bksv.com/urbannoise 13

8. airPorT enVironmenT managemenT
Brüel & Kjær has been working with airports for a long time – over 30 why is airporT noise Our AirTrak Carbon Manager software noiseoffiCe managed a range of soluTions
years to be precise. We help airports manage their growth by ensuring moniToring imporTanT? enables airports to assess and influence serviCes for differenT needs
their carbon emissions.
regulation compliance, minimising their environmental footprints and You cannot manage what you don’t Modern organisations understand We have developed a portfolio of
measure. Noise is a serious issue for the benefits of focusing their efforts solutions that deliver value for a wide
building strong community partnerships. We work closely with our client
airports as neighbouring communities The BesT way To handle on managing their core business and range of requirements, from small air-
base of over 250 airports on five continents, to meet environmental chal- become more vocal in their opposition ComplainTs leaving things like noise compliance fields who simply need to track flights
lenges, both today and into the future. We offer the industry’s broadest to environmental impact and seek to monitoring to specialised service pro- and respond to community complaints,
Responding quickly to complaints and
constrain airport development. viders. By partnering with Brüel & Kjær to our flagship ANOMS which manages
suite of product and service solutions, and we are currently expanding into queries, and guaranteeing environmen-
and our NoiseOffice suite of tailored noise at some of the most environmen-
the monitoring of air quality and carbon emissions. Accurate noise measurement is es- tal transparency and accountability are
services, airports find that they can tally-constrained airports in the world.
sential to demonstrate compliance with excellent ways to build better relations
provide a higher quality result for their
The first airport noise monitoring system delivered by Brüel & Kjær was to local regulations and provide precise and community tolerance. Our Airport
stakeholders and save money.
With additional applications that work
information in order to mitigate future Noise and Operation Monitoring Sys- with community stakeholders and regu-
fornebu airport in norway, back in 1966. Since then, more than 250 simi-
noise disturbance and improve com- tem (ANOMS) provides instant answers lators, and with our NoiseOffice suite
lar systems have been delivered to airports all around the world – from munity relations. to complex questions about noise, off- of tailored services, we are able to offer
los angeles, uSa to Sydney, australia. track flights, weather conditions, and the most comprehensive suite of solu-
other issues that concern members of tions for airport noise management.
modelling for the community.
The fuTure
Self-service complaint entry via our
Our products and services enable air-
WebTrak online interface frees airport
ports to create precision noise contours noiseoffiCe – Tailored airporT serviCes
staff to concentrate on more general
of historical data and make calculated
community building activities.
predictions of future noise impact using
NoiseOffice
actual data collected on flight tracks,
alongside noise and weather informa- Building greaT EnvironmEnt DEpt. opErAtions DEpt. Community AirlinEs
tion. CommuniTy relaTions NoiseDesk FlightOps WebTrak WebTrak FlyQuiet
The Scenario Builder software applica- Community tolerance and amicable
tion simplifies and automates the crea- relations are key to successful airport
tion of noise contours and emissions operation and future development.
inventories. ANOMS
Our solution gives the public a better
understanding of the airport’s impact
The rising impaCT of on its mitigation procedures by facili-
air QualiTy tating investigation, report building,
and displaying live tracking and noise AirTrak
Greenhouse gas emissions, carbon
data. These transparent programs show
footprints and general air quality have
that the airport is serious about meet-
become key issues at airports around
ing its environmental obligations to
the world. There are multiple levels of
the broader community, which in turn
data collection, analysis, reporting and Scenario Builder
builds greater community acceptance.
compliance that individual airports are
facing as necessary additions to their NoiseOffice – A range
of solutions targeted to
current environment management
different needs
operations.
14 www.bksv.com/airportnoise 15

9. Structural analysis is vital to understand and optimise the actual behaviour and inherent dynamic properties of structures, leading
to lighter, stronger and safer constructions, lower fuel/power consumptions, higher comfort and better performance.
STruCTural With product development cycles becoming increasingly complex, shorter, more integrated, highly automated and performed
in parallel, structural analysis is done at various stages and levels during the development process. Consequently, systems for
analySiS
structural analysis must efficiently and accurately identify the root causes of structural weaknesses and provide powerful tools
for finding optimal solutions to the problems.
Brüel & Kjær offers unique, fully-featured and easy-to-use structural analysis solutions developed in close cooperation with
leading companies and academics around the world. With the acquisition of ldS, Brüel & Kjær now offers complete solutions
for combined structural and vibration testing.
ClassiCal operaTional operaTing defleCTion sTruCTural dynamiCs TesT–fea CompleTe
modal analysis modal analysis shapes analysis modifiCaTions inTegraTion measuremenT Chain
In Classical Modal Analysis a model In Operational Modal Analysis (OMA) In Operating Deflection Shapes (ODS) With Structural Dynamics Modifications Integration of test and FEA is a core Our complete and fully integrated
of a structure’s dynamic behaviour is only the output responses are meas- analysis the vibration pattern of a struc- (SDM) you can simulate the effects that discipline in structural analysis. Using a measurement chain includes accelerom-
obtained by exciting the structure with ured and the natural ambient and op- ture is measured and visualised during structural modifications will have on finite element model you can increase eters, impact hammers, force transduc-
measurable forces and determining the erating forces are used as unmeasured stationary, quasi-stationary or transient your structure without having to actu- the quality of your modal test by pro- ers, modal shakers, data acquisition
response/excitation ratio. Our hammer input. OMA is used instead of classical operating conditions influenced by fac- ally make them. Based on an original viding optimal excitation and response front-ends, and measurement and
and (multi-) shaker testing systems are modal analysis for accurate modal tors like engine speed, pressure, temper- modal model, a modal model of the locations. By comparing FEA and model post-processing software, letting you
used in many areas, including trouble- identification under actual operating ature, flow or ambient forces. Our solu- modified structure is calculated and can test results you can refine your finite select the optimal solution for your
shooting and diagnostics, benchmark- conditions, and in situations where tions support all types of ODS analysis be compared to the original. Our solu- element models. Our solutions include structural analysis needs. Whether you
ing, simulation studies and design opti- it is difficult or impossible to control including Time ODS, Spectral (frequency tions support modal models obtained a variety of tools for pre-test analysis, require a small system for ODS analysis,
misation. Our modal analysis solutions artificial excitation of the structure. or order based) ODS and Non-stationary from testing or Finite Element Analysis model correlation, model updating, or a multi-shaker system with hundreds
guide you through the complete setup, Our patented systems use state-of-the- (run-up/down) ODS. Also included are (FEA), and include industry standard and design optimisation. Interfaces and of accelerometers for large-scale modal
measurement and analysis in simple and art technology providing automatic unique capabilities like Graphical Tacho FEA elements such as springs, masses, drivers for leading FEA programs like surveys, we can meet your needs with
intuitive steps, and provides you with suppression of harmonic components, Setup for easy conditioning of tacho sig- dampers, rods, bars, plates, bricks and Abaqus, Ansys, Nastran (NX and MSC) flexible, scalable and open solutions.
accurate and reliable results even in unbiased modal parameter estimators, nals, and Autotracking for fundamental tuned absorbers. and I-deas (UFF) are also provided.
the most demanding situations, with a crystal-clear stabilization diagrams, and frequency extraction directly from a
targeted set of best-in-class modal pa- automated mode estimation. measurement signal when no physical
rameter estimators and validation tools. tacho signal is available.
Brüel & Kjær
provides
solutions for
structural
analysis
of blades,
PULSE Reflex Modal Analysis is a modern and Distributed LAN-XI modules facilitate OMA of In-operation engine and powertrain testing using gearboxes, Model correlation and updating of a powertrain
intuitive application for classical modal analysis, large civil engineering and mechanical structures OMA and ODS analysis towers and using the FEMtools™ CAE software
being used here for aircraft engine turbine blade nacelles
testing
16 www.bksv.com/structuralanalysis 17

10. noiSe SourCe idenTifiCaTion
achieve more rapid benchmarking, troubleshooting and target setting
with a complete set of noise source identification (nSi) methods. These
methods cover a wide range of applications across the complete audible
frequency range. The user is presented with informative maps and accurate
quantities that enable him to rapidly locate and quantify noise sources.
sound inTensiTy mapping aCousTiC holography Beamforming
one platform for all methods ensures full inter-operability, which maxim-
ises ease-of-use and yields optimal value for money. Sound intensity is a well-established, Array-based measurements (fixed or Beamforming is a
cost-efficient method for mapping and hand-held arrays) provide the fastest method of mapping
The nSi methods have proved their worth on such varied sound sources ranking sources. The world’s smallest measurement process and the highest noise sources by dis-
hand-held sound intensity system based quality of results. Statistically Opti- tinguishing sound levels
as hearing aids, wind turbines, cars, aeroplanes and high-speed trains by Gearbox test rig with
on a sound level meter is eminently mised Near-field Acoustic Holography based on the direction from colour contour plot
identifying the most important sub-sources in terms of position, frequency suitable for on-site measurements. (SONAH) provides detailed acoustical which they originate. The method is very
content and sound power. Sub-sources may be ranked to identify where Sound intensity is used for sound information of steady or transient noise quick, allowing a full map to be calcu-
power determination, particularly in sources either as a planar or a confor- lated from a single-shot measurement
design changes will most effectively improve the overall noise radiation.
difficult acoustic environments. mal map. A position detection system where all channels are measured simulta-
spheriCal Beamforming
integrated into the hand-held array neously. Real-time beamforming gives a
Practical nSi began in the early 1980s with the introduction of sound Since sound intensity mapping typically
automatically registers the positions quick, accurate evaluation before making Spherical Beamforming quickly pro-
intensity measurement techniques and associated mapping. This opened involves a large number of points,
actually measured, which greatly re- a single-shot data capture. Beamforming duces an omnidirectional overview
measurements are most effectively
new applications such as in situ sound power determination and in situ duces measurement error and increases uses a planar wheel array of microphones map of sound pressure contributions
performed using an automated micro-
measurement speed. to combine optimal acoustical results from all directions. Transient Spherical
absorption measurements. at the same time, the first near-field acoustical phone positioning system (robot).
with ease of use and handling. It is used Beamforming is used in vehicle cabins
holography methods were developed. Taking advantage of the ever- in wind tunnels, for pass-by noise evalua- to rapidly evaluate squeak and rattle in
increasing processing power, the nSi tools have evolved to fulfil ever-more tion of vehicles and trains, and aeroplane an easy to understand manner.
stringent demands from customers. fly-over measurements.
Hand-held
sound intensity
The latest additions to the portfolio are conformal mapping calculations system
and sound quality metrics calculations. Type 2270-G
Pentangular
array
in field use
Array Robot and sound intensity system Hand-held array with position detection system Semi-circular array used for moving source Spherical Beamformer used for in-vehicle
calibration using SONAH beamforming measurements
18 www.bksv.com/nsiarray 19