This technology is the result of 30 years of experience and joint research on the acoustics of large rooms with Roger Lamoral and Lothar Cremer. First in scale model then in digital version, they have proven through large projects, such as the Acropolis in Nice or the Berlin Philharmonie, the importance of visualizing the temporal ordering and the direction of the energy of the wave trains received at the ears of the listener. These technical advances translate the acoustic performance over time of the architectural design. They make it possible to co-design acoustic responses to architectural hypotheses. Planète Acoustique has therefore developed the HallAcoustics modeling software, based on finite elements, making it possible to visualize the acoustic performances of any volume, shape and materials.