• S_TOOLS-STx: Acoustic, speech and signal processing application for Windows. Developed by ARI.
  • Lab Facilities
  • ExpSuite: Software for Psychoacoustic Tests: Software framework for hearing-related experiments with acoustic and electric stimulation. Developed and hosted by ARI.
  • ARI HRTF Database: The ARI HRTF database contains high-resolution HRTFs of more than 70 subjects.
  • Subjects: Database software for subjects data. Developed and hosted by ARI.
  • LTFAT: Toolbox for time-frequency analysis in Matlab/Octave. Hosted by Peter Søndergaard. Contains contributions from ARI.
  • AMToolbox: Auditory-modeling toolbox for Matlab/Octave. Initiated by Peter Søndergaard. Hosted and maintained by Piotr Majdak.



The ARI HRTF database contains high-resolution HRTFs of more than 200 subjects. Most subjects were measured using in-the-ear microphones, for a few others we used behind-the-ear microphones placed in hearing-aid devices. 1550 positions were measured for each listener including the full azimuthal-space (0° to 360°) and elevations from -30° to +80°. The frontal space has a resolution of 2.5° in the horizontal plane.

Detailed Description

HRTF positions

Tools and Documentation

These tools and documentation may help you to interact with the HRTFs:


In-the-ear HRTFs

      In-the-ear microphone

Behind-the-ear HRTFs

      Behind-the-ear microphone

Anthropometric Data

  • Download Anthropometric data for 60 listeners from the database above as a .mat-file (Matlab).
  • All subjects from the Anthropometric database are also available in our acoustically measured database. The indices used in this database can be linked to indices from the ARI HRTF database when replacing the leading "3" by "NH". (Examples: Anthropometric ID 3002 = HRTF ID NH2; Anthropometric ID 3720 = HRTF ID NH720)
  • Please read the corresponding documentation readme.pdf before using the anthropometric database!


The Auditory Modeling Toolbox (AMT) is a Matlab/Octave toolbox intended to serve as a common ground for all auditory modelling in Matlab or Octave.

The AMT has been initiated by Peter Søndergaard and contains contributions of many international auditory research groups. 

The AMT is now developed and maintained by Piotr Majdak.


is a simple database for subject data management. It uses SQLite database in the backend.

Download setup file:


Download source files:

Please contact the autors Michael Mihocic or Piotr Majdak

History file (release notes)

Required Add-on: ADO.NET 2.0 Provider for SQLite

License: EUPL

Subjects - a simple software for subject data management.

Copyright (C) 2010-2016 Acoustics Research Institute - Austrian Academy of Sciences; Michael Mihocic and Piotr Majdak

Licensed under the EUPL, Version 1.1 or – as soon they will be approved by the European Commission - subsequent versions of the EUPL (the "Licence")

You may not use this work except in compliance with the Licence.

You may obtain a copy of the Licence at:

Unless required by applicable law or agreed to in writing, software distributed under the Licence is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the Licence for the specific language governing permissions and limitations under the Licence.



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The Linear Time/Frequency Toolbox (LTFAT) is toolbox for  time-frequency analysis in Matlab/Octave.

LTFAT is developed at:

  • CAHR, Technical University of Denmark,
  • ARI , Austrian Academy of Sciences
  • LATP, Universite de Provence.