Chat with us, powered by LiveChat

Careers | Training | Resource!!!

arrow_back_ios

Main Menu

See All Products See All Knowledge See All Services & Support See All Solutions See All About See All Contact Us See All Demo See All Load cells title
arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustic application See All Software See All Transducers See All Vibration Testing Equipment See All Electroacousticsb - OLD unpublished See All Academy See All Resource Center See All Services See All Support See All Applications See All Industries See All Our Business
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Transmission Gearboxes See All Turbo Charger See All DAQ systems See All High precision and calibration systems See All Industrial electronics See All Power Analyser See All S&V Handheld devices See All S&V Signal conditioner See All Accessories for electroacoustic application See All DAQ See All Drivers API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Acoustic See All Current / voltage See All Displacement See All Load cells See All Pressure See All Strain Gauges See All Torque See All Vibration See All Temperature See All LDS Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Accessories for modal exciters See All Test Solutions See All Training Courses See All Primers and Handbooks See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Acoustics See All Asset & Process Monitoring See All Electric Power See All NVH See All OEM Custom Sensors See All Structural Integrity See All Vibration See All Automotive & Ground Transportation See All Business Ethics
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Fusion-LN See All Accessories for industrial electronics See All Handheld Software See All Accessories for S&V handheld devices See All BK Connect / PULSE See All API See All Microphone sets See All Microphone Cartridges See All Acoustic calibrators See All Special microphones See All Microphone Pre-amplifiers See All Sound Sources See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories for strain gauges See All Non-rotating (calibration) See All Rotating See All CCLD (IEPE) accelerometer See All Charge accelerometer See All Impulse hammers / impedance heads See All Cables See All Accessories See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All Resources See All Electroacoustics See All Environmental Noise See All Noise Source Identification See All Product Noise See All Sound Power and Sound Pressure See All Vehicle Pass-by Noise See All Production Testing and Quality Assurance See All Machine Analysis and Diagnostics See All Structural Health Monitoring See All High Voltage See All OEM Sensors for the Agriculture Industry See All OEM Sensors for Robotics and Torque Applications See All Structural Dynamics See All Material Properties Testing

Acoustic material testing

Testing materials for their acoustic characteristics lets you understand the contribution they will make to the overall acoustic experience of a room, vehicle, etc.

The effect of materials in construction and as insulation makes a huge difference in the acoustic experience. In offices and classrooms, the use of special materials can transform a space and with it the activities inside. In some applications – such as aircraft engines – they are what keep the vehicle within legal exterior noise limits. In others, like wind tunnels and anechoic chambers, acoustic materials are essential components in creating a noise-free, uniform test environment.

 

Creating an acoustic environment

To create a specific acoustic environment, it is necessary to understand the acoustic performance of the materials used. Testing materials for their acoustic characteristics lets architects, designers and engineers understand the contributions they can make to the overall sound, in terms of absorption, reflection, impedance, admittance; including transmission loss. Repeatability and precision are the keys to effective material testing – and data must be exportable to update predictive models.

 

Mitigating unwanted sound

To remove unwanted noise, one needs to match an acoustic material to the specific characteristics of the sound. But selecting the right material for the job is challenging. Certain materials alter some sound components, such as high frequencies, more than others do. Also, the selected material must create the desired acoustic effect in concert with other materials in the structure. What’s more, the structure’s final shape can affect the acoustic performance of its materials, such as the nacelle liners in an aircraft engine. A precise understanding of the material’s acoustic characteristics, such as its performance at certain frequencies, is essential – both before and after structural integration.

Acoustic material testing is the process for determining the acoustic characteristics of materials in terms of absorption, reflection, impedance, admittance and transmission loss. Growing focus on noise control issues, combined with the emergence of sound quality in product design, makes acoustic material testing increasingly relevant to engineers, designers and manufacturers in a broad range of industries. For example, improving cabin acoustic comfort by providing optimal acoustic material performance against weight and volume is one of today’s challenges in the ground transportation and aerospace industries. Similarly, protection against noise in dwellings and at the workplace most often requires the appropriate selection of noise-reducing treatments.

A range of standards covers acoustic material testing, prescribing well-defined acoustical conditions and special instrumentation to ensure accuracy and repeatability. Our complete acoustic material testing systems make measurements on small samples according to ISO 10534-2, ASTM E1050-12 and ASTM E2611-17 international standards.

System suggestion

Acoustic material testing system overview

PULSE Acoustic Material Testing in a Tube Type 7758 is software for determining the acoustic properties of noise control materials, whether used to absorb airborne sound or to reduce airborne sound transmission. It works in conjunction with Brüel & Kjær’s Impedance Tube Kits, Transmission Loss Tube Kit and any other custom measurement tube. 

Related Products

Increasingly stringent aerospace environmental regulations are demanding improvements in liner attenuation, which is driving ever-improved impedances in installed acoustic liners. As a result, fully bonded panels must now be assessed for their true effective acoustic behaviour in their final condition. These measurements are superseding the traditional geometric and DC load flow methods.

System suggestion

Impedance measurements system overview

The Portable Impedance Meter System is a lightweight, compact, robust and user-friendly system suitable for both research and production quality control impedance measurements up to 150 dB SPL. Based on the two-microphone transfer function test method, it includes PULSE Material Testing and Impedance Meter software, a LAN-XI generator module as the input module for the two microphones, and a generator for the impedance meter sound source and for control of the environmental parameters. A power amplifier, conveniently housed in a double LAN-XI casing, provides the amplification of the generator signal. A portable impedance tube, accessories and a carrying case that holds all the elements of the system, are also included. 

Related Products

Related Information

Modern Slavery Statement     Imprint    Cookie Policy    Privacy Policy    Sitemap    Ethical Business

 

© 2025 Hottinger Brüel & Kjær

 

 

close
nCode logo
Graphics Brand

We haved moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
ReliaSoft-Logo-webp
Graphics Brand

We haved moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
Prenscia HBM-Logo rgb
Graphics Brand

We haved moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
HBM-Logo blue rgb
Graphics Brand

We haved moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.

close
logo of Brüel & Kjær (BKSV), experts of sound and vibration measurements from HBK
Graphics Brand

We haved moved ${referer} to www.hbkworld.com

 

This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.