---
license: cc-by-4.0
task_categories:
- audio-classification
- audio-to-audio
tags:
- spatial-audio
- ambisonics
- room-impulse-response
- rir
- simulation
- 3d-front
---

# HiFi-HARP: High-Fidelity Hybrid Ambisonic Room Impulse Responses (FOA Version)

## Dataset Summary

**HiFi-HARP (FOA Version)** is a large-scale dataset of First-Order Ambisonic (FOA) Room Impulse Responses (RIRs) generated via high-fidelity hybrid acoustic simulation. It is derived from the larger 7th-order HiFi-HARP dataset.

This dataset is designed to support research in spatial audio, specifically for tasks such as:
* Sound Source Localization (SSL)
* Dereverberation
* Acoustic Parameter Estimation ($T_{60}$, DRR)
* Spatial RIR Generation

The RIRs are simulated in realistically furnished indoor scenes from the **3D-FRONT** dataset, ensuring geometric and semantic complexity.

## Dataset Structure

Due to storage constraints, this repository hosts the **First-Order Ambisonics (FOA)** version of the dataset. The data is partitioned into two compressed archives:

* **`FOA_train.zip`**: Contains the training set of FOA-RIRs.
* **`FOA_valid.zip`**: Contains the validation/test set of FOA-RIRs.

### File Format
* **Audio Format:** `.wav` files
* **Channels:** 4 channels.
* **Sample Rate:** 16 kHz.

## Simulation Methodology

The RIRs were generated using a robust **Hybrid Simulation Pipeline** that combines wave-based and geometric acoustic methods to achieve high fidelity across the frequency spectrum:

1.  **Low Frequencies (< 900 Hz):** Simulated using a Finite-Difference Time-Domain (FDTD) wave solver to accurately model diffraction and room modes.
2.  **High Frequencies (> 900 Hz):** Simulated using a geometric ray-tracing approach to capture specular reflections and scattering.
3.  **Scene Data:** Furnished rooms from the 3D-FRONT dataset with varying volumes, shapes, and material properties.

*Note: While the original dataset was generated at 7th-order (64 channels), this version has been truncated to 1st-order (4 channels) for ease of distribution.*


## Citation
@article{saini2025hifi,
  title={HiFi-HARP: A High-Fidelity 7th-Order Ambisonic Room Impulse Response Dataset},
  author={Saini, Shivam and Peissig, J{\"u}rgen},
  journal={arXiv preprint arXiv:2510.21257},
  year={2025}
}