TUT Tietotalo Ambisonic Impulse Responses from a Moving Source

A collection of 32-channel impulse responses recorded in a university corridor using a moving loudspeaker and an Eigenmike spherical microphone array. The dataset includes responses at two distances (1m and 2m), nine elevation angles from -40 to 40 degrees, and 36 azimuth angles at 10-degree resolution. Researchers from Tampere University created this data for work on sound event localization and detection of overlapping sources.

Use Cases

• Training machine learning models for sound source localization based on multi-channel impulse responses.
• Simulating realistic room acoustics for virtual/augmented reality applications using measured impulse responses.
• Developing and testing algorithms for Ambisonic audio encoding and decoding based on the 32-channel Eigenmike recordings.
• Researching the effects of source movement on acoustic channels using the time-varying impulse responses estimated in the STFT domain.

Strengths

• Includes impulse responses for a moving source, estimated using a least-squares regression tool from the CHiME challenge.
• Covers a detailed spatial grid with 36 azimuth angles, 9 elevation angles at 1m, and 5 elevation angles at 2m.
• Recordings were made with a controlled setup where playback volume was 30 dB greater than ambient sound level.
• Data is structured in a multi-dimensional array (2, 9, 1025, 36, 4, 32) capturing distance, elevation, frequency, azimuth, time blocks, and channels.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Tampere University of Technology (TUT), Tietotalo building.

Collection Method

Impulse responses acquired using a maximum length sequence (MLS) played from a moving Genelec G Two loudspeaker around an Eigenmike array, with post-processing using a CHiME challenge tool and MUSIC algorithm for direction-of-arrival analysis.

Geography

Recorded in a corridor inside the Tietotalo building at Tampere University of Technology, Finland.