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UPV_RIR_DB: A Structured Room Impulse Response Database with Hierarchical Metadata and Acoustic Indicators

Jesús García-Gamborino, Laura Fuster, Daniel de la Prida, Luis A. Azpicueta-Ruiz, Gema Piñero

Abstract

This paper presents UPV_RIR_DB, a structured database of measured room impulse responses (RIRs) designed to provide acoustic data with explicit spatial metadata and traceable acquisition parameters. The dataset currently contains 166 multichannel RIR files measured in three rooms of the Universitat Politècnica de València (UPV). Each multichannel RIR file contains impulse responses for multiple source-receiver pairs, with each pair covering a 25 cm2 area - the typical size of a personal sound zone. Considering the number of sources and receiver channels associated with each microphone modality, the database contains a total of 18,976 single impulse responses. A hierarchical organization is adopted in which directory structure and metadata jointly describe the measurement context. Each room includes a metadata file containing acquisition parameters, hardware description, spatial coordinates of zones and microphones, and acoustic indicators such as reverberation time. A central index links each RIR file with its experimental context, ensuring traceability and enabling reproducible analysis. The resulting database provides a consistent framework for storing, inspecting, and reusing real RIR measurements while preserving compatibility with both MATLAB- and JSON-based workflows. The UPV_RIR_DB dataset is publicly available through the open repository Zenodo.

UPV_RIR_DB: A Structured Room Impulse Response Database with Hierarchical Metadata and Acoustic Indicators

Abstract

This paper presents UPV_RIR_DB, a structured database of measured room impulse responses (RIRs) designed to provide acoustic data with explicit spatial metadata and traceable acquisition parameters. The dataset currently contains 166 multichannel RIR files measured in three rooms of the Universitat Politècnica de València (UPV). Each multichannel RIR file contains impulse responses for multiple source-receiver pairs, with each pair covering a 25 cm2 area - the typical size of a personal sound zone. Considering the number of sources and receiver channels associated with each microphone modality, the database contains a total of 18,976 single impulse responses. A hierarchical organization is adopted in which directory structure and metadata jointly describe the measurement context. Each room includes a metadata file containing acquisition parameters, hardware description, spatial coordinates of zones and microphones, and acoustic indicators such as reverberation time. A central index links each RIR file with its experimental context, ensuring traceability and enabling reproducible analysis. The resulting database provides a consistent framework for storing, inspecting, and reusing real RIR measurements while preserving compatibility with both MATLAB- and JSON-based workflows. The UPV_RIR_DB dataset is publicly available through the open repository Zenodo.

Paper Structure

This paper contains 33 sections, 2 equations, 15 figures, 5 tables.

Table of Contents

  1. Introduction
  2. Motivation and Objectives
  3. Paper Organization
  4. Public Datasets and Standards
  5. Overview of public datasets
  6. Measurement methods and standards
  7. Identified gaps and adopted criteria
  8. RIR acquisition and experimental design
  9. Measurement equipment
  10. Measured rooms and acquisition methodology
  11. Room_iTEAM_8G4C_mat
  12. Room_Teleco_4P13_mat
  13. Room_Teleco_4D26_mat
  14. Measurement conditions
  15. Acquisition protocol
  16. ...and 18 more sections

Figures (15)

  • Figure 1: Measurement hardware used in the acquisition campaigns: (a) 4x4 array microphone, (b) 8-source loudspeaker array, and (c) Neumann KU100 Dummy Head.
  • Figure 2: Buildings housing the rooms used for the database. In parenthesis the acronym of the corresponding room: (a) iTEAM (8G4C), (b) ETSIT Building 4P (4P13), and (c) ETSIT Building 4D (4D26).
  • Figure 3: Measurement layout used in Room 8G4C. Zones Z03--Z07 are associated with SC1, whereas zones Z01, Z02, and Z08--Z10 are associated with SC2.
  • Figure 4: Local measurement scheme for a regular two-point zone. The AR modality uses a $4 \times 4$ grid with 0.07 m spacing, and the offset between P01 and P02 is 0.035 m in both $x$ and $y$.
  • Figure 5: Regular adjacent-zone extension used in the basic measurement layout of Rooms 4P13 and 4D26. Adjacent zone centers are spaced by 0.50 m in both $x$ and $y$.
  • ...and 10 more figures