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Acoustics

Room acoustics, sound insulation, noise maps, listening.

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Screenshot from the lab build. Room acoustics in BimCraft: reverberation time for each room of the sample house, and octave-band results for one room with carpet, a tiled ceiling and 12 people
Screenshot from the lab build. Room acoustics in BimCraft: reverberation time for each room of the sample house, and octave-band results for one room with carpet, a tiled ceiling and 12 people
Room acoustics in BimCraft: a source and a listener placed on the room plan, with the controls to play a sound dry or in the room
Room acoustics in BimCraft: a source and a listener placed on the room plan, with the controls to play a sound dry or in the room

Overview

To be written (AL.3): what it does, in plain words.

Who it’s for

  • Room acousticians, architects and AV designers: reverberation, clarity and speech intelligibility per seat, treatment drawings, and a listening demo for the client.
  • Building acousticians: airborne and impact ratings between rooms, including flanking.
  • Environmental noise consultants: noise maps, façade levels and barriers.
  • HVAC engineers: duct-borne noise from the fan to the room.

What you can do

  • Reverberation per octave band from the model's own finishes (BimCraft › Rooms › Acoustics).
  • Listen to a room before it is built: Play it dry, then Play it in this room.
  • Seat maps of clarity and speech intelligibility (phase S2).
  • Wall and floor ratings with flanking (phase S3).
  • Noise maps on CivilCraft terrain (phase S4).

Methods and standards

Sabine, Eyring and Arau-Puchades for quick checks; image source and ray tracing for real rooms; finite-difference time domain below the Schroeder frequency; ISO 3382 room parameters and the IEC 60268-16 speech transmission index; ISO 12354 for flanking; CNOSSOS-EU and ISO 9613-2 outdoors. Standards are cited by clause.

Data and sources

Absorption and scattering coefficients by octave band from published test data, each cited; assembly ratings from lab reports. You can add your own materials.

Verification

Rooms are checked against the BRAS benchmark (measured rooms, open data) and outdoor propagation against the ISO/TR 17534-3 test cases. Today the statistical part matches its textbook figures (Sabine 1.44 s, Eyring 1.37 s on the test room) and the computed impulse response measures back within 10 %.

Limits

A design aid: results are predictions, not measurements. Below the Schroeder frequency the geometric methods are not used. Flanking needs junction details and says when it estimated them.

Files and formats

To be written (AL.3): what it reads and writes, and what it stores inside drawings.

Get started

  1. Add Acoustics.
  2. Open a BimCraft model and pick a room.
  3. Choose finishes, then press Play it in this room.

Languages

No languages are listed for this add-on yet. Its maker may add some.

Works in

EditionWorksNote
Browser (/use) (yours) Added on demand Fetched the first time you use it, then kept for offline use.
Studio from getcadcraft.com Added on demand Fetched the first time you use it, then kept for offline use.
Microsoft Store Added on demand Fetched the first time you use it, then kept for offline use.
Google Play Added on demand Fetched the first time you use it, then kept for offline use.
iPad and iPhone (App Store) Included; switch it on Part of the reviewed app; your list switches it on.
Custom build Added on demand Fetched the first time you use it, then kept for offline use.

Comes with

Adding it brings these too. Engines are shared: each downloads once for every add-on that uses it.

Needed by: Acoustical engineering, Architecture.

Versions

VersionChannelDateWhat changed
1.0.0stableOctober 28, 2026First version in the Library.

Licence and maker

CadCraft (CadCraft, first-party). Licence: Apache-2.0. Dependencies carry their own licences, listed on their pages.