2019_05_25_KFB_ACOUSTICS_60
Solutions | Testing Solutions

Testing Solutions

All of our work revolves around commitment to forge a new path toward a future with reduced noise and better acoustics

FROM CONCEPT TO PROTOTYPE

We use laboratory measurements to characterize acoustic properties
We use a variety of software modules to translate measurements into acoustical performance measures
We can develop analytical models to predict the impact of resulting treatment enhancements on the acoustical performance of a product
We can build prototype hardware to demonstrate improved performance

Solutions applied to industry

  • Vehicles

    Whether its a rolling noise or an electric engine buzz, whether inside or outside, we measure, analyze, design and prototype to deliver the best possible acoustical performance of the product.

    Our capabilities include:

    • Tuned vibration damper design,
    • Development and prototyping,
    • Sound quality,
    • Modal analysis,
    • Radiated sound,
    • Air induction tuning,
    • Sound package development.

    Each division at KFB has a unique focus in acoustics. Together, with our engineers and scientists we work to deliver solutions applied to our customers needs

    Whenever you are in the need of our services you can always rely on:

    • Constant customer support,
    • Individual approach,
    • In-house prototyping and experiments capabilities,
    • Acoustic trainings.

  • Construction equipment

    Together, we work with our customers to optimize acoustical criteria by making recommendations regarding physical properties, surface treatments to achieve the best performance results of the product.

    Our capabilities include:

    • Measurements,
    • Identification of noise and vibration transmission paths,
    • Optimization of acoustical criteria by designing the guidelines using calculations, experiments and virtual prototyping,
    • Analytical and experimental tools, and the expertise to design the treatment that is right for your product.

    Each division at KFB has a unique focus in acoustics. Together, with our engineers and scientists we work to deliver solutions applied to our customers needs.

    Whenever you are in the need of our services you can always rely on:

    • Constant customer support,
    • Individual approach with a broad view,
    • In-house prototyping and experiments capabilities,
    • Acoustic trainings.

  • Machines and services

    From structural testing to custom software and everything in between we provide turn-key testing services to help our clients achieve a technical lead. Whether it is a blender, toothbrush, speaker or a coffee machine, our unique ability to leverage multiple disciplines give us the possibility to understand clients needs and work with you to deliver a world class product.

    Our general scope of work includes:

    • Measurements,
    • Identification of noise and vibration transmission paths,
    • Optimization of acoustical criteria by designing the guidelines using calculations, experiments and virtual prototyping,
    • Analytical and experimental tools, and the expertise to design the treatment that is right for your product.

    Each division at KFB has a unique focus in acoustics. Together, with our engineers and scientists we work to deliver solutions applied to our customers needs.

    Whenever you are in the need of our services you can always rely on:

    • Constant customer support,
    • Individual approach with a broad view,
    • In-house prototyping and experiments capabilities,
    • Acoustic trainings.

  • Materials and construction elements

    Whether the optimum solution is a barrier that blocks sound, or a treatment designed to absorb sound energy, or an optimized combination, we can help you find the best noise treatment for your product. With our extensive knowledge and experience in measuring acoustic and damping properties, we can provide accurate results for the development of your noise control materials. Its very common that a treatment with special acoustic properties is needed to improve product performance.

    Our capabilities include:

    • Measurements,
    • Identification of noise and vibration transmission paths,
    • Optimization of acoustical criteria by designing the guidelines using calculations, experiments and virtual prototyping,
    • Analytical and experimental tools, and the expertise to design the treatment that is right for your product.

    Acoustic materials may be designed for:

    • Maximum noise absorption,
    • Maximum noise blockage,
    • Minimum sound radiation from structural components.

    We work with our customers to optimize treatment acoustical performance by making recommendations regarding physical properties, surface treatments, and process variables. Using modeling technology, our engineers can predict the installed acoustical performance of the end product. The acostical material can then be optimized for the particular cost, weight, and space requirements of each end product application.

    Whenever you are in the need of our services you can always rely on:

    • Constant customer support,
    • Individual approach with a broad view,
    • In-house prototyping and experiments capabilities,
    • Acoustic trainings.

WHENEVER YOU ARE IN THE NEED OF:

01
Sound and vibration transmission paths
In complex structures with many connections, waves can propagate taking multiple possible paths from source before they reach a certain point. In KFB Acoustics we rank transmission paths (by using Transfer Path Analysis) in order to find most dominant paths in vibration or noise transmission. Dominant paths must be dealt with first (removing connection, introducing damping), before changing other, less important paths.
02
Sound absorption
Sound absorption coefficient describes the phenomenon, where the acoustic wave penetrating the material is partially absorbed inside it and converted into heat. It is defined as the ratio of the acoustic energy absorbed inside the material to the total energy of the incident wave. We use the phenomenon when designing acoustic solutions (acoustic ceilings, casings, silencers). We also measure this parameter in our measuring stand (impedance tube).
03
Airborne and impact sound insulation
Airborne sound insulation of a partition simply equals the transmission loss of this partition (see definition of the transmission loss). Impact sound insulation allows to assess the properties of the floor when it is structurally excited (e.g. steps). We use these parameters when designing acoustic solutions (acoustic enclosures, partitions) and when assessing existing building partitions and ceilings.
04
Structure borne noise
Noise that does not propagate in the air, but in solids in the form of vibrations. Structure borne noise and the associated flanking transmission can significantly deteriorate the acoustic insulation of partitions in buildings. We conduct structure borne noise measurements to assess the vibration levels and create numerical models. We take into account the influence of flanking transmission in our vibroacoustic simulations.
05
Insertion loss of silencers
Acoustic parameter describing acoustic silencers. It describes the decrease in sound power generated by the pipe outlet as a result of installing a silencer in this pipe. We carry out measurements of this parameter in laboratory and field conditions. This parameter is also the main output of our virtual prototyping simulations when designing new silencers.
06
Airflow resistivity
This is an important parameter describing porous sound-absorbing materials that we use when simulating porous materials. The greater the flow resistivity, the less the acoustic wave can penetrate the material, resulting in a lower sound absorption coefficient.
07
Sound power
A parameter that uniquely characterizes any acoustic source. The acoustic power is a parameter independent of the surroundings and the environment (reverberation field, open space) in which the source is located. It is the basic acoustic parameter declared by manufacturers of machines and devices. We perform measurements of this parameter for declaration purposes and for simulation purposes.
08
Sound intensity
A vector quantity describing the acoustic fields in terms of energy. The intensity analysis determines the direction of the acoustic energy flow, not just the amplitude. This is a significant advantage over standard measurements that only determine the sound pressure. We carry out sound intensity measurements in situations where pressure methods fail (e.g. in conditions of high background noise levels).
09
Hand-arm-vibrations
Hand-arm-vibrations (HAV) are vibrations, that are transmitted to the hand and arm when using hand-held power tools (for example chainsaws, jack-hammers or while holding materials being processed by machines). We use this parameter to determine the degree of exposure of workers to excessive vibration.
10
Reverberation time
It is a parameter that describes the reverberation properties of acoustic interiors. Reverberation results from the fact that in every room with a finite acoustic absorption, reflected waves are generated. The acoustic field associated with these reflections remains in the room for some time after the sound source (direct wave) is turned off. We use this parameter in our acoustic simulations.
11
Transmission loss
It is a parameter that describes the properties of all objects on the boundary of which there is a partial reflection of acoustic energy and a partial transmission of acoustic energy. An example of such an object is a building partition. We use these parameter when designing acoustic solutions (acoustic enclosures, partitions) and when assessing existing building partitions and ceilings. We conduct laboratory and field tests in this area.
12
Sound propagation
The propagation of an acoustic wave takes place in every elastic medium (gases, liquids, solids). The acoustic wave propagates in the medium at a finite speed, for example for air at a temperature of 20 degrees Celsius, the speed of sound is 343 m/s. During propagation, waveform changing phenomena may occur, e.g. diffraction. Our environmental simulations take into account multiple effects altering sound propagation.
13
Damping, internal loss factor, and coupling loss factor
Losses occur in every real mechanical and acoustic system. The consequence of the occurrence of damping is the conversion of part of the vibration energy into heat. This phenomenon is quantified by a parameter called the Internal Loss Factor, ILF. The second mechanism is the flow of energy from one structure to another as they are connected to each other. We measure CLFs and DLFs in our laboratory.
14
Complex characteristic impedance and wave number
Advanced parameters describing porous sound-absorbing materials. We use this parameters in material modeling (FEM simulations) when an equivalent fluid model is appropriate. We determine complex characteristic impedance and wave number in our double impedance tube system.
"Our test facilities offer turn-key services, with on-site engineering personnel, electronics technicians, mechanical support staff and complete warehousing capabilities.""
Production&Assembly_2
Learn our approach

How do we work?

It doesn’t matter if it’s an excavator, a fan, a building partition or a crane. If you need to determine the acoustic parameters of your product – we are here for you.

We always take individual customer needs into account. We review appropriate standards dedicated to a given device. We design and build specialized measuring stands that meet standard requirements for specific tests. We carry out measurements, analyze the data and present the research results in the form of a clear report. The client can always count on our experts opinions and interpretations of the obtained results.

In addition to testing solutions, we offer services related to the characterization of individual elements of the device. It allows to rank these elements in terms of generated noise -ranking of sources- and indicate the most important paths of noise transmission.

Obraz4
"We work with our customers to optimize treatment acoustical performance by making recommendations regarding physical properties, surface treatments, and process variables"
Bartosz Chmielewski
CSO, KFB Acoustics

Related solutions

See all solutions

Custom solutions
and services

Please contact us to inquire information about our custom solutions and services.

Get in touch

Case studies

Cookies

We use cookies (technical and profiling cookies from us and third parties) on KFB-acoustics.com to provide you with a better online experience and to deliver you with online commercial messages tailored on your preferences. If you select “continue” or access any content of our website without customizing your choices, you agree to the use of cookies. Find out more about our cookie policy and how to refuse cookies by clicking here.

Continue