AURA Module

Accurate and Fast Impulse Response Simulations  


Developed in cooperation with the renowned Institute for Technical Acoustics at RWTH Aachen University, the AURA module incorporates the power of modern acoustic simulation algorithms with EASE, increasing its potential and efficiency.

AURA is composed of a hybrid Ray Tracing engine, which uses both a deterministic Image Model (Cone Tracing) and Stochastic Ray Tracing methods, taking advantage of the best they can offer to speed up the computation without compromising accuracy.
STI simulation of a stadium with 160 loudspeakers. Calculated with AURA on a 64-bit computer with 32 cores (64 threads).
STI simulation of a stadium with 160 loudspeakers.
Calculated with AURA on a 64-bit computer with 32 cores (64 threads).


Get the Most Out of Powerful Computers
High-end algorithms allow you to use all resources available on modern machines with 64-bit CPUs and several cores, as well as large amounts of RAM and disk space. This guarantees considerable reduction of calculation times, which are especially important for large or complex projects!
64-Bit CPUs Utilization

Compute Key Acoustic Parameters According to ISO 3382 Standard 

Evaluate the room or system design based on measures defined in the International Standard on Room Acoustic Measurements ISO 3382. AURA is capable of adding all the following measures to EASE:

  • Early Decay Time (EDT) 
  • Reverberation Time (T10, T20, T30)
  • Lateral Fraction (LF)
  • Lateral Fraction Coefficient (LFC)
  • Definition (D, C50)
  • Clarity (C80)
  • Sound Strength (G)
  • Center Time
  • Echo Criteria for Speech and Music
    according to Dietsch and Kraak
  • STI (IEC60268-16:2003 and 2011)
  • Articulation Loss (% AlCons)

Mapping of the reverberation time (T30) at several points of a theatre.Mapping of the reverberation time (T30) at several points of a theatre.

Compute Full Impulse Response Data 

AURA generates full-length impulse response data. While large or complex rooms often limit the capabilities of conventional Ray Tracing and Mirror Image algorithms and therefore require adding an extrapolated reverberant tail in post-processing, AURA’s hybrid approach can simulate reflectograms and impulse responses up to the length of the reverberation time and even longer. Only in this manner late reflections as well as coupled reverberant spaces can be analyzed reliably and subsequently auralized by the EARS Module.


Take Into Account Scattering Coefficients

The effect of sound scattering by structured surfaces and surface materials is only taken into account with AURA. The Wall Material database module includes a Scattering Wizard that allows real-life approximations of scattering coefficients.

For users who are uncertain about the degree of scattering of particular surfaces, the new default “S-curve” of scattering coefficients developed in cooperation with RWTH Aachen is key. Results should be closer to reality and less tuning of the scattering coefficients should be necessary.

Discover also our flagship software for the simulation of scattering coefficients of complex structures: AFMG Reflex. The tool is completely compatible with EASE and its results can be instantly exported to an EASE Wall Material file.

Use AURA for Realistic Auralizations with the EARS Module

Due to the computation of full and high-density impulse responses and the consideration of scattering effects, the binaural data generated with AURA is generally more suitable for auralizations with the EARS module, producing more realistic acoustic impressions!

The AURA module adds the following main resources to EASE:

  • AURA Mapping: allows mappings according to ISO3382 over Audience Areas, surfaces or at Listener Seats through the computation of an echogram.
  • AURA Response: calculates a detailed reflectogram that can be used for reflection analysis and from which a Binaural Impulse response or set of B-Format result files can be computed for auralizations.
  • Diffuse reflections according to the scattering coefficients defined in wall materials are taken into account. This leads to a denser and more realistic reflectogram.
  • AURA supports multi-threading on 32- and 64-bit computers with several processor cores, speeding up computations significantly. On 64-bit machines AURA can use all RAM available. Users are free to configure their calculation machine according to their project needs and budget.


To learn more about the different versions of EASE and their applications, please see: 
Which quality level of calculations does EASE offer?

For direct feature comparison, please refer to:
EASE Software Versions and Modules