Conventional impedance tube
Mecanum’s conventional impedance and transmission tube is specially designed to measure key acoustic indicators of a wide range of materials using 2 microphones, 3 microphones or 4 microphone methods.
Available in 29 mm, 44.4 mm or 100 mm. Custom diameters available on demand.
Why choose Mecanum’s Conventional Impedance Tube?
Follows ASTM E1050, ASTM E2611 and ISO 10534-2 standards
Choosing an impedance tube compliant with ISO and ASTM standards ensures accuracy, reliability, and global acceptance. It offers precise measurements, compatibility with other equipment, regulatory compliance, and long-term value, making it a prudent choice for industries and research where absorption and transmission loss data are crucial.
Made for characterizing sound absorption and transmission loss
Mecanum Conventional Impedance Tube offers a cost-effective and precise solution for characterizing sound absorption and transmission loss of acoustic materials. Its ability to utilize small samples makes them ideal for rapid prototyping and development of new materials.
Normal incidence sound absorption data is a key input for inverse or indirect characterization software such as FOAM-X. It will retrieve the physical properties of your acoustic material needed to perform advanced acoustic simulations with all commercial simulation software like NOVA, VA-one, COMSOL, Hexagon, etc.
Versatile for research, quality control and education purposes
Its ease of use and accuracy make it a preferred choice for various applications, particularly in research and development, quality control, and even education. In research and development, it allows engineers to quickly test new acoustic materials on small samples, minimizing costs and speeding up the innovation process. For quality control, it ensures that the performance of supplied materials meets specifications, providing a reliable means of validation.
In an educational setting, this conventional impedance tube facilitates the practical teaching of acoustic properties of materials, such as absorption, reflection, and transmission, while also introducing students to measurement techniques and signal processing. It is a comprehensive tool that supports both theory and practice in the acoustics of materials.
Suitable for advanced testing solution for aircraft engine and silencer liners thanks to the grazing incidence sample holder
Our grazing incidence sample holder (optional) ensures accurate evaluation of liner performance under grazing incidence conditions, simulating real-world operating environments. By measuring the transfer matrix using four-microphone impedance tubes, engineers can derive critical acoustic parameters like impedance and transmission loss.
Compatible with both square and circular tubes, this innovative grazing incidence sample holder offers versatility for various testing needs. A specialized version is available for high-level acoustic measurements in aircraft engine applications.
Conventional Impedance Tube techs specs
Dimensions
Nominal dimensions
- 29 mm diameter tube: 800 (L) x 200 (W) x 200 (H) mm
- 44.4 mm diameter tube: 800 (L) x 200 (W) x 200 (H) mm
- 100 mm diameter tube: 1200 (L) x 200 (W) x 200 (H) mm
Max sample thickness
- 2 microphones absorption: 250 mm
- 3 microphones transmission: 220 mm
- 4 microphones transmission: 125 mm
Measuring range
Frequency range
- 29 mm diameter tube: 50 Hz to 6600 Hz
- 44.4 mm diameter tube: 45 Hz to 4300 Hz
- 100 mm diameter tube: 35 Hz to 1800 Hz
Hard wall measurement (zero absorption)
- All ⅓ octave until 4 kHz < 4 %
- ⅓ octave 5 kHz and above < 10 %
What’s in the box
Impedance and transmission tube with digital piston for thickness reading
Anechoïc termination
Microphones
24-bits 4-inputs/1-output acquisition system with integrated audio amplifier
Verification sample
Grids to support flexible materials
Rings to minimize air leakage around the sample
TUBE-X measurement software
Carrying box
Measured Properties
Accessories
Accessories For Porous Materials
Circular knive
Allows better control of porous material samples geometry.
Material slicer
Holds a porous sample in place during slicing.
Weather station
Allows to measure the air atmospheric conditions.
Fabric sample holder
Ensure a sealed installation of fabric materials or other type of resistive films.
Grazing incidence
Used with acoustic treatments such as aircraft liners, muffler coatings, and pipe treatments.
Square add-on
Allows to measure acoustics indicators of square specimen like metamaterials.
Muffler adapters
Designed to fully measure acoustics indicators of mufflers.
