An Automatic Method for Determining the Acoustics of a Room in Real-time

The invention provides a method for describing the acoustics of a room in real-time, based on its geometric representation. It allows for easy verification of the acoustical properties of a room (e.g. reverberation time) without the need for acoustical measurements.

The input data for the algorithm is obtained by scanning the room with an infrared depth sensor, a laser scanning device, an ultrasound scanning device or a 3D camera (e.g. Microsoft Kinect). The method works with both high and low-end scanning equipment, and it may be used as an alternative to or an addition to acoustical measurements in a room.  

The method uses a simple model to build a numerical representation of the room from the output of the scanning procedure. Based on this, it is possible to provide an acoustical room model which can be updated in real-time with a limited processing power, which makes the method ideal for modeling dynamic, interactive environments.
The acoustical properties required to build the (acoustical) model of such an environment can be acquired automatically by doing material classification from RGB and depth information. The acoustic representation is dynamic, as it updates based on the movements of the sound source or the receiver, as well as any other changes occurring in the environment: windows are opened, objects are moved, etc. 

APPLICATIONS

  • Increased immersion in computer gaming
  • Room analysis for audio surround systems (e.g. home cinemas, Hi-Fi sound systems)
  • Spatial sound rendering for virtual reality applications (e.g. de-reverberation of audio signal for teleconferencing)
  • Auralization in architectural planning
  • Generating input for acoustics modeling software

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