An easy way to get reliable sound absorption test results for your acoustic materials in Australia!
The Megasorber Test Cube is a reduced size reverberation testing chamber and the only one of its kind in the southern hemisphere.
The testing methods, results and reports produced by this reduced size reverberation testing chamber are globally recognised for the measurement of sound absorption properties of acoustic materials.
Test Cube is constructed according to ISO 354:2003 'Acoustics – Measurement of sound absorption in a reverberation room'.
Measuring the sound absorption of acoustic materials is often done using a standard reverberation chamber or an impedance tube. Megasorber's Test Cube is a reduced size reservation test chamber which has some advantages over these other two units.
The Megasorber Test Cube provides accurate results in the 400 Hz to 10,000 Hz range, which corresponds particularly well to the human speech and hearing range.
The absorption coefficients of acoustic materials are usually measured using one of the two normalised methods. These are the impedance tube, or tube of Kundt, and the reverberation room.
These two methods differ by the incidence angle that the sound waves impinge on the surface of the material. In the impedance tube, the waves arrive at the surface perpendicularly, whereas in the reverberation room the angles of incidence are evenly distributed.
The absorption coefficients obtained with the two methods differ significantly. If comparative tests of the absorption of different materials are performed, the resulting rank ordering can be totally different, depending on which method is used.
As the sound fields encountered in most of the applications are much closer to that existing in the reverberation chamber than to almost perpendicular incidence, this method gives absorption coefficients which are more meaningful to the application than those obtained with the impedance tube.
Although this fact is recognised, the reverberation room is rarely used primarily because a large room and large samples are required. The measurements are also rather time-consuming to conduct.
Megasorber Test Cube is a reverberation room of reduced size to eliminate these disadvantages while keeping the advantages of the method.
Furthermore, Megasorber Test Cube provides the equivalent sound absorption coefficient of acoustic systems, such as moulded acoustic panels, baffles and full assembly 3D components.