3D spatial distribution of acoustic parameters in the sound recording studio at the Warsaw University of Technology

The sound recording studio at the Faculty of Electronics and Information Technology recently underwent a complete remodelling. This paper reports post-modernisation measurements of key acoustic parameters, including reverberation time (RT), early decay time (EDT), clarity (C80), and interaural cross-correlation (IACC). In light of the room’s intended future use for 3D sound reproduction systems, acoustical conditions were evaluated throughout the entire room volume. Measurements were taken across the floor area corresponding to the installed QRD Schroeder diffusers and were repeated at elevations matching the diffusive wall shapes in the middle layer (3.4 m) and the sound-absorbing material in the top layer (5.5 m) of the room treatment. The results demonstrated a proper and highly uniform distribution of all measured parameters, both horizontally and vertically. This finding is further supported by positive feedback from sound engineers and music performers who have worked in the studio.