Simulation
Test the design in the model, not in the building.
3D noise propagation models to ISO 9613-2, indoor acoustic simulation, and contour mapping that compare design options while a change still costs nothing.
The problem this solves
A noise barrier that turns out undersized, a rooftop chiller compound that fails the boundary limit, a glazing specification one class too low: each is a five-figure or six-figure correction after construction and a model run before it. We use simulation as a decision-making platform, not a presentation graphic: comparing options, sizing mitigations, and reducing uncertainty before procurement.
What we deliver
Outdoor: 3D environmental noise models per ISO 9613-2 for road traffic, industrial plant, and mixed-use sites; day and night contour maps (LAeq, Lden) demonstrating compliance at boundaries and sensitive receptors; rooftop MEP compound modeling with barrier sizing and enclosure optimization; barrier insertion loss comparison before and after mitigation; facade exposure prediction by floor and orientation, from which we derive minimum wall and glazing insulation ratings.
Indoor: reverberation time prediction by octave band from 125 Hz to 4 kHz; sound pressure level distribution mapping for auditoria, ballrooms, classrooms, and public spaces; speech intelligibility prediction (STI and STIPA); treatment optimization testing material placement before construction; room modal analysis for critical listening environments.
Bar colour scale: 35 dB(A)85 dB(A)
Method and standards
Outdoor propagation follows ISO 9613-2. Models are calibrated with our own survey data, and their predictions are verified by measurement at commissioning.
How this scope is appointed: directly, as a sub-consultant to the architect or the MEP engineer, or as an independent review of a model another party has produced.
Not sure whether a model will settle your question? Tell us what decision is waiting on it.
Proof
3D traffic noise propagation modeling for King Abdullah Financial District in Riyadh and for the BLF Nahr tower in Lebanon, where the model derived the facade insulation ratings. Full 3D outdoor simulation within the Waldorf Astoria Al Madinah acoustic design.
Questions we are asked
What standard governs outdoor noise modeling?
ISO 9613-2, the attenuation standard our propagation models implement.
Can simulation replace measurement?
No. The model makes decisions cheap; the measurement makes them defensible.
What inputs do you need to build a model?
Architectural drawings, MEP plant selections with sound data where available, and site survey results. Where data is missing, we measure it or state the assumption in the report.
Related services: Environmental Noise Assessment Architectural and Building Acoustics
Send drawings and the plant schedule and we will tell you what the model can settle.