Room acoustic simulation tool for the optimization of absorbing ceilings

By Gerd Høy Marbjerg

Room acoustic simulation tool for the optimization of absorbing ceilings

If a simulation tool is to be used for the optimization of absorbing ceilings, it is important that it includes a good acoustical description of the surfaces. In most available tools the surfaces are described by how large a portion of the incident energy is absorbed and how large portions of the reflected energy are specularly and diffusely reflected. These properties are determined by assuming that the angle of incidence of the sound on the absorber is random.

Rooms where absorbing ceilings are installed are often small rectangular rooms with most of the absorption located on the ceiling. In such rooms the angle dependence of the absorption and phase shifts on reflections play an important role.  To be able to model both specular and diffuse reflections a combination of the image source model and radiosity will be used in the project.

The project aims at developing an advanced simulation tool, which employs impedance descriptions of the surfaces making it suitable for optimization of absorbing ceilings.

Completed in 2016

Funded by Saint-Gobain Ecophon, industrial PhD

http://www.act.elektro.dtu.dk/Research/Completed_Phd_projects/Gerd-Hoey-Marbjerg
7 APRIL 2020