Microflown In-Situ Absorbtion Testing
MF005 A truly in situ method to accurately measure the properties of your material
There are many unwanted noise sources in our industrialised society. Acoustic noise pollution can be reduced by absorbing sound energy. Absorbing material packages are used in many applications to attenuate sound. Knowing exactly the acoustic properties of your materials and the effectiveness of the applied material packages is a requirement to successfully reduce noise levels. The In-situ absorption setup is a solution to achieve just that.
Destructive testing of material samples is no longer required. Furthermore, sound absorption can be measured under any angle of incidence. The extremely high spatial resolution that the system provides, enables the analysis of inhomogeneous, e.g. perforated materials.
There are many unwanted noise sources in our industrialised society. Acoustic noise pollution can be reduced by absorbing sound energy. Absorbing material packages are used in many applications to attenuate sound. Knowing exactly the acoustic properties of your materials and the effectiveness of the applied material packages is a requirement to successfully reduce noise levels. The In-situ absorption setup is a solution to achieve just that.
Destructive testing of material samples is no longer required. Furthermore, sound absorption can be measured under any angle of incidence. The extremely high spatial resolution that the system provides, enables the analysis of inhomogeneous, e.g. perforated materials.
The In-situ Absorption system features at a glance
With a small, handheld impedance gun the acoustic absorption, reflection or impedance can be measured in just a few minutes, broad band and under normal and oblique angles.
With a sound source at 23cm from the probe, noise is generated towards the sample. The impedance gun is equipped with a system designed to decouple the sensors from structure born vibration generated by the spherical loudspeaker. The sound pressure and acoustic particle velocity are measured directly on the surface of the material. The absorption & reflection coefficient can be obtained directly from the measured impedance as the complex ratio of sound pressure to particle velocity.
- Frequency range 300Hz - 10kHz
- In situ method
- Measurement of: · Impedance · Sound refection coefficient · Sound absorption coefficient
- Non destructive method
- Normal & oblique angles of incidence
- Flat & curved surfaces
- Homogeneous & inhomogeneous materials
- Easy to operate
- Suitable for: · Product development · End of line control before and after assembly
Hardware
