Megasorber's Test Cube - a Reverberation Testing Chamber
Sound Absorption Testing Service
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.
Quick set-up and requires only a small sample size
Reverberation testing chamber microphones for measuring the sound pressure decay
Integrity and accuracy of results – widely accepted as a global testing standard
Measuring Sound Absorption 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.
Key Advantages of Test Cube
- Testing requires only a small sample size 1.2m x 1m (1.2 m2)
- Non-destructive testing: can test the entire assembly
- Diffuse sound field – real life situations
- Broad range of test frequencies (400 Hz to 10,000 Hz)
- Quick experimental setup
- Comparable results to standardised reverberation room
- Integrity and accuracy of results – widely accepted as a global testing standard
- Fast and cost-effective to measure
Advantages Over Standard Reverberation Chamber
- Much smaller sample size can be tested: 1.2m x 1m, rather than 10 m2 to 12 m2
- Cost effective
- Non-destructive testing: can measure sound absorption of an entire built-up unit or 3D-shaped object
Advantages Over Impedance Tube
- Measures using a diffuse sound field – giving real–life conditions
- Larger measuring surface, not just a small cut-out disc
- Fast and accurate measurement results
Test Cube Key Features
- Constructed to standard ISO 354:2003 'Acoustics – Measurement of sound absorption in a reverberation room'
- Globally accepted for its test methods, results and reporting
- Reduced size: linear dimensions is one-third of those of an international standard reverberation room
- No two walls are parallel
- Fully reflective and diffuse sound field inside
- Fully sound-insulated to keep the background noise low
- Excitation: three loud speakers located on the corners
- Measuring: 5 microphones measure the sound pressure decay simultaneously
- Fast and accurate measurement result output.
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
Contact Megasorber today to have your acoustic material tested
Technical Information About the Megasorber Test Cube Reverberation Chamber
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.