EASE acoustic modelling is used for rooms with complex geometry or demanding music and speech requirements. The model tests architecture, finishes and the sound system before equipment is purchased and installed.
Room-acoustic model in EASE 4.4
Calculation model of the room and sound-reinforcement system

What an EASE calculation can answer

The digital model compares loudspeaker positions, aiming, delays, gain structure and acoustic finishes. It predicts coverage uniformity, available level and speech intelligibility across the audience area. Typical applications include concert, theatre, assembly and conference halls, sports venues, houses of worship, clubs and multipurpose spaces. Separate operating scenarios can be modelled for conferences, concerts and presentations.

3D geometry and material data

The process starts with a three-dimensional model of the room or outdoor area. Walls, ceiling, floor, stage, balconies and major objects are represented as planes with assigned absorption and reflection data. Values come from software libraries, manufacturers’ documentation or measurements. For existing rooms the model is refined using the actual finishes and on-site acoustic data.
Selection of acoustic materials for the room model
Surface data reflects the sound-absorption properties of each material
Reverberation-time modelling
Changing surface materials changes the predicted reverberation time
Geometry and surface data are used to calculate reverberation time by frequency band. If the result does not suit the venue, the type, area and location of acoustic treatment are adjusted.

Loudspeaker selection and placement

Once the room response is understood, loudspeakers are added using verified manufacturer data such as directivity, sensitivity, power handling and frequency response. The engineer compares mounting points, height, aiming, delay and zoning. Where coverage is uneven, the loudspeaker type, position or orientation is revised.
Loudspeaker placement in the acoustic model
Loudspeaker location and aiming are tested before installation

Direct and reflected sound

Direct sound-pressure level shows which seats receive sufficient energy directly from the loudspeakers. Coverage maps are produced for relevant frequency ranges and the working bandwidth. Reflected energy is then included. Comparing direct and reflected sound identifies areas where reflections may reduce clarity and estimates the maximum useful operating level.
Sound-pressure coverage map
Coverage maps show level uniformity across the listening area

Speech intelligibility and quality indicators

Reverberation, room geometry and loudspeaker data are combined to estimate speech intelligibility. Critical projects are supplemented by measurements and a verification method agreed for the project. Direct-to-reverberant ratio, clarity, early and late reflections and other indicators are also reviewed. No single graph is sufficient; the design is assessed as a complete engineering system.
Speech-intelligibility calculation in EASE
Calculated indicators help evaluate speech transmission in every zone

Project deliverables

  • 3D room model and modelling assumptions;
  • reverberation-time calculation and finish recommendations;
  • sound-pressure and speech-intelligibility maps;
  • loudspeaker location and aiming plan;
  • recommendations for amplification, processing and zoning;
  • technical report for design documentation.
EASE 4.4 remains in the article title as the source methodology and software version. For new projects Verdamare selects the current validated software version, compatible manufacturer data and the reporting format required in the project country.