IOT-SRIR: A Dataset of Spatial Room Impulse Responses Across an Indoor-Outdoor Transition

This dataset contains Spatial Room Impulse Responses (SRIRs) acquired using an open spherical microphone array. The measurements were conducted at the side entrance of the Kirchhoffbau building at Technische Universität Ilmenau (coordinates: N50.682716, E10.938899). The site comprises an indoor hallway with an adjacent four-story staircase and an outdoor walkway leading to partially covered bicycle racks. The indoor area has a floor area of 68.46 m², a ceiling height of 4.09 m, and a volume of approximately 250 m³, excluding the staircase. The floor is covered with stone tiles, and the walls are untreated. Glass panels with a total area of approximately 20.50 m² surround the doors connecting the hallway to adjacent spaces. During all measurements, the door connecting the indoor and outdoor areas remained fully open. The exposed outdoor area extends up to 7.10 m from the aperture, while the first 0.40 m remain covered by the door frame. The bicycle-rack roof contains a 1.00 m wide opening along its centerline. Two stationary loudspeakers (Geithain RL906) were positioned indoors and outdoors, respectively. In addition, a moving loudspeaker (Genelec 8010A) was mounted together with the receiver, maintaining a constant distance of 1.20 m and an angular offset of 30° relative to the receiver y-axis. Measurements were recorded at 43 receiver positions with two repetitions per position. A spacing of 0.20 m between adjacent positions was used within ±2.20 m of the aperture separating the indoor and outdoor areas, while a spacing of 0.50 m was used for the remaining positions. The file Measurement_Overview.pdf provides a floor plan of the measurement site, including all receiver positions as well as the positions and orientations of the loudspeakers. Photographs of the measurement environment are available in Pictures.zip.