Mecanum’s conventional impedance and transmission tubes are specially designed to measure key acoustic indicators of a wide range of materials using 2, 3 or 4 microphone methods.

Available in 29 mm, 44.4 mm or 100 mm.

Main Advantages

Why Choose Mecanum’s Conventional Impedance and Transmission Tubes?

Efficient

Method according to ASTM E1050, ASTM E2611 and ISO 10534-2 standards

Wide Range

29 mm tube: 50 – 6600 Hz
44.4 mm tube: 45 – 4300 Hz
100 mm tube: 35 – 1800 Hz

Easy

Digital piston allowing very precise and accurate settings and measurements

Convenient

Available in three different diameters to offer the best fit for all of your materials

What’s Included With Your Conventional Tube

Discover What You Will Find 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

Applications

One Instrument, Multiple Uses

Measure

Absorption or transmission measurement, you can do both!

Compare

Find the best material by comparing the properties you measured!

Control

Ensure your quality is maintained to meet the standards important for you

Research

Generate new knowledge or new technologies through an efficient R&D

Want to Go Further?

Characterize (FOAM-X needed)

Determine the properties of open-cell porous materials: open porosity, static airflow resistivity, tortuosity, viscous and thermal characteristic lengths, static thermal permeability and elastic parameters

Measured Properties

Discover What Your Conventional Impedance and Transmission Tube Can Do for You!

Absorption coefficient at normal incidence (α)

Complex reflection coefficient at normal incidence (R)

Normalized surface impedance (Zs/Zair)

Normal incidence transmission loss (NSTL)

Normalized characteristic impedance (Z/Zair)

Wave number (k)

Equivalent dynamic bulk density (peq)

Equivalent dynamic bulk modulus (Keq)

Transfer matrix coefficients (Tij)

ASTM E1050 Standard

ISO 10534-2 Standard

ASTM E2611 Standard

Absorption coefficient at normal incidence (α)

Complex reflection coefficient at normal incidence (R)

Normalized surface impedance (Zs/Zair)

Normal incidence transmission loss (NSTL)

Normalized characteristic impedance (Z/Zair)

Wave number (k)

Equivalent dynamic bulk density (peq)

Equivalent dynamic bulk modulus (Keq)

Transfer matrix coefficients (Tij)

ASTM E1050 Standard

ISO 10534-2 Standard

Absorption coefficient at normal incidence (α)

Complex reflection coefficient at normal incidence (R)

Normalized surface impedance (Zs/Zair)

ISO 10534-2 Standard

Accessories For Your Conventional Tube

We Have The Perfect Accessory To Suit Every Need!

Circular Knives

Allow better control of the samples geometry of your porous materials

Material Slicers

Hold a porous sample in place, providing better control of its geometry

Weather Station

Allows to measure the air atmospheric conditions

Sample Holders

Ensure a sealed installation of fabric materials or other type of resistive film

Square Add-On

Allows to measure acoustics indicators of square specimen like metamaterials

FOAM-X

Extract multiple acoustic parameters thanks to FOAM-X software

NOVA

Simulate multilayer acoustic materials thanks to NOVA software

Interested? Ask for Your Free Quote!

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