Square impedance tube
Mecanum’s Square Impedance and Transmission Tube is specially designed to measure key acoustic indicators of a wide range of materials using 2 or 4 microphone methods. This instrument is ideal for measuring metamaterials such as sonic crystals and many more.
Available in 38.1 mm and 100 mm.
Why choose Mecanum’s Square Impedance Tube?
Follows ASTM E1050, ASTM E2611 and ISO 10534-2 standards
Choosing a square 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.
Specifically designed for acoustic metamaterial testing
In collaboration with industrial and research partners in the field of acoustic metamaterials, we are proud to introduce a cutting-edge square impedance tube. This innovative tool is designed specifically for the precise testing and analysis of metamaterials, providing unmatched accuracy and ease of use.
One of this square impedance tube’s key innovations is the newly designed sample holder, which features three transparent sides and a movable top. This design not only offers clear visibility but also simplifies the process of inserting and adjusting test samples. The movable top allows for flexibility and efficiency during testing, making it ideal for experiments that require rapid changes between sample configurations.
Additionally, the square impedance tube’s parallel walls enable infinite reflections , creating a network of unitary cells that mimics the behavior of metamaterials. This unique design feature allows researchers to test complex acoustic behaviors with greater accuracy, facilitating the development of next-generation metamaterials.
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.
Square Impedance Tube techs specs
Dimensions
Nominal dimensions
- 38.1 mm tube: 1400 (L) x 110 (W) x 240 (H) mm
- 100 mm tube: 1800 (L) x 160 (W) x 240 (H) mm
Max sample thickness
- 2 microphones: 200 mm
- 4 microphones: 200 mm
Measuring range
Frequency range
- 38.1 mm tube: 45 Hz to 4300 Hz
- 100 mm tube: 35 Hz to 1600 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
TUBE-X measurement software
Carrying box
Measured properties
Accessories
Accessories for porous materials
Grazing incidence sample holder
Used with acoustic treatments such as aircraft liners, muffler coatings, and pipe treatments.
