Spatial Acoustic Impulse Response Dataset of the Main Auditorium — Musical Theatre in Gdynia

This dataset contains spatial acoustic impulse response recordings from 33 measurement positions in the main auditorium of the Musical Theatre in Gdynia (Teatr Muzyczny im. Danuty Baduszkowej), acquired using a 5th-order ambisonics microphone array and a calibrated omnidirectional loudspeaker.
Measurements were conducted as part of a student group research project (ID-761) at the Department of Multimedia Systems, Gdańsk University of Technology, completed in February 2026. The study aimed at comprehensive acoustic characterization of the theatre hall, combining higher-order ambisonics (HOA) spatial audio techniques with classical room acoustics measurements.
The dataset comprises three file sets:

34 proprietary ambisonics recordings in .spcmic format (~25 GB), captured with the Spcmic 5th-order microphone array at positions pkt01–pkt33 plus one test recording;
rendered 84-channel RAW WAV files at 32-bit float / 48 kHz (~18 GB);
rendered 36-channel 5th-order ambisonics (5OA) WAV files at 24-bit / 48 kHz (~5.7 GB).

Classical acoustic parameters (reverberation time RT60/T30/EDT, early decay, clarity C50/C80, definition D, speech intelligibility) were measured independently using a calibrated NTI M2230 Class 1 measurement microphone with NTI DS3 dodecahedron loudspeaker and Room EQ Wizard (REW) software, yielding 3 measurement database files (.mdat, ~537 MB). Total dataset size is approximately 49 GB.
All microphone positions covered the full seating area of the auditorium. During all recordings the microphone was oriented toward the stage center, where the measurement loudspeaker was placed. The data enable spatial analysis of acoustic distribution, directional energy visualization, and derivation of standard ISO 3382 room acoustic parameters. Complementary MATLAB processing scripts, polar plots, spatial heatmaps, and an EASE 3D acoustic model are available via the associated GitLab repository: https://git.pg.edu.pl/MarekSwarcewicz/teatr-muzyczny-gdynia-akustyka