Content - ELWIS

ELWIS

The best-in-class measurement system

ELWIS (Evaluation of Light Weight Impedance System), the latest addition to the Autoneum measurement system portfolio, allows for a full and rapid characterization of porous materials. While the evaluation of different acoustic concepts usually requires a large database of material measurements, ELWIS only needs a single sample of a porous material from the manufacturing line or from a vehicle component.

ELWIS consists of the applications ELWIS-A and ELWIS-S which can be used separately; however, both are needed for a complete material simulation.
ELWIS-A evaluates acoustic parameters that are needed to evaluate the acoustic performance of sound insulation and sound absorbing multi-layer treatment.
ELWIS-S measures structural parameters (including the “Poisson Ratio” for foam materials) that are needed to simulate the dynamical and acoustical behaviour of real finite-size sound package parts in the medium to low frequency range.

 

ELWIS is very easy to operate: thanks to its user-friendly software, users with only limited expertise on porous material characterization can use ELWIS and obtain correct results.

The unique benefits:

  • the ideal tool for obtaining the material parameters used input data for component simulation using e.g. SISAB or SEA
  • the right choice to quickly compare the performances of different sound package solutions or materials
  • software can easily be operated also by non-experts
  • rapid, easy and reliable data evaluation with only one porous material sample
  • supersedes large databases with material parameters to make the right decision regarding sound packages
  • can also be used as a quality control system
  • adaptable to a wide range of materials and parts
  • combines the benefits of inverse methods together with innovative post-processing and material knowledge

 Technical details:

Overall dimensions:0.85 x 2.21 x 1.24 m [D x W x H]
Accommodated sample size:ELWIS-A, 60 mm diameter, ELWIS-S, 100 mm diameter
Frequency range:ELWIS-A – 200 to 3000 Hz
Standards:Fulfills the ASTM (E-1050) and ISO (10534-1/2) standards

for impedance tube measurements (measurements between 200 and 3400 Hz)

 

 

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