Square impedance tube

Applications

  • Absorption measurement

  • Transmission measurement

  • Research and development

  • Comparative analysis

  • Quality control

Description

Mecanum's impedance and transmission tubes are specially designed to measure key acoustic indicators of a wide range of materials using 2 or 4 microphone methods. The square tube is ideal for measuring metamaterials such as sonic crystals and many more.

Standards & certifications

  • ASTM E1050

  • ISO 10534-2

  • ASTM E2611

Main advantages

  • Frequency range: 45-4300 Hz

  • Measurement method according to ASTM and ISO standards

  • Ease of use

  • Ideal measurement method for metamaterials

  • Durability

  • Measurement quality

Included

  • An impedance and transmission tube with digital piston with thickness reading;

  • An anechoic termination;

  • Microphones;

  • A 4-input / 1-output acquisition system with integrated audio amplifier;

  • TUBE-X measurement software;

  • A verification sample;

  • A carrying case;

Properties measured

Absorption coefficient at normal incidence (α)

Complex reflection coefficient at normal incidence (R)

Normalized surface impedance (Zs/Zair)

Normal Incidence Attenuation Index (NSTL)

Normalized characteristic impedance (Z/Zair)

Wave number (k)

Dynamic Equivalent Density (peq)

Equivalent dynamic compressibility modulus (Keq)

Transfer matrix coefficients (Tij)

ASTM E1050 Standard

ISO 10534-2 Standard

ASTM E2611 Standard

2
mics

4
mics

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Frequency range

Standard frequency range (Hz)

Frequency range with large microphone spacing (Hz)

Frequency range with the small microphone spacing (Hz)

Square tube
38.1 mm

45 to 4300

45 to 2000

115 to 4300

Accessories

  • Foam-X Software

  • Nova software

Documents