impedance tube 29mm

29mm

44mm

100mm

Square

Asphalt

High level

Description

Mecanum's 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. The three-microphone method is based on ASTM E2611 where unknown loads are replaced by known air cavities. The third microphone is inserted into the piston and is always exposed to maximum pressure for the best "signal to noise" ratio.

Standards & certifications

• ASTM E1050

• ISO 10534-2

• ASTM E2611

Main advantages

• Frequency range: 50-6600 Hz

• Measurement method according to ASTM and ISO standards

• Ease of use

• Measurement method taken from the scientific literature

• Durability

• Measurement quality

Applications

• Absorption measurement

• Transmission measurement

• Research and development

• Comparative analysis

• Quality control

• Determination of the properties of open-cell porous materials by tube measurements and FOAM-X software. The obtained properties are the open porosity, static airflow resistivity, the tortuosity, the viscous and thermal characteristic lengths, the static thermal permeability and elastic parameters.

Included

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

• An anechoïc termination;

• Microphones;

• A 24-bits 4-inputs/1-output acquisition system with integrated audio amplifier;

• TUBE-X measurement software;

• A verification sample;

• Grids to support flexible materials;

• Rings to minimize acoustic leakage around the sample;

• A carrying case;

Accessories

• Circular cutter for porous materials

• Porous material slicer

• ENVIRO Station

• FOAM-X Software

• NOVA software

• Resistive screen holder (44.44mm only)

• Square specimen holder for metamaterials (44.44mm only)

Videos