Acoustic Performance Testing System (Impedance Tube)

Impedance tubes are used to measure the acoustic properties of materials, such as the sound absorption coefficient, reflection coefficient, acoustic impedance, and acoustic admittance of materials. The results can be used to compare the basic absorption performance of a material and for acoustics simulations.

Sample Requirements

• Sample size requirements: circular with a diameter of 100 mm and 30 mm.

Application

• For testing the sound absorption coefficient of various materials (such as building sound-absorbing materials, automotive interior materials, industrial sound-absorbing materials, etc.)
• Research and development of new materials

Instrument and Result Display

FAQ

Q. What parameters can be tested by the impedance tube?

A. The measurable parameters of this project are as follows.

The normal incidence characteristics that can be measured by the dual-microphone method: sound absorption coefficient, reflection coefficient, and acoustic impedance rate.

The normal incidence characteristics that can be measured by the four-microphone method include sound absorption coefficient, reflection coefficient, acoustic impedance, acoustic impedance, transmission loss coefficient, complex wave number equivalent mass density, and equivalent bulk modulus transfer matrix coefficient.

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