air

Created by Marco Jeub, Magnus Schäfer, Hauke Krüger, Christoph Matthias Nelke, Christophe Beaugeant, Peter Vary

version	1.4.2
license	MIT
source	https://www.iks.rwth-aachen.de/en/research/tools-downloads/databases/aachen-impulse-response-database/
usage	commercial
languages
format	wav
channel	2
sampling rate	48000
bit depth	16
duration	0 days 00:04:43.719958333
files	107, duration distribution: 0.7 s 10.0 s
repository	data-public
published	2023-12-21 by audeering-unittest

Description

The Aachen Impulse Response (AIR) database is a set of impulse responses that were measured in a wide variety of rooms. The initial aim of the AIR database was to allow for realistic studies of signal processing algorithms in reverberant environments with a special focus on hearing aids applications. The first version was published in 2009 and offers binaural room impulse responses (BRIR) measured with a dummy head in different locations with different acoustical properties, such as reverberation time and room volume. Besides the evaluation of dereverberation algorithms and perceptual investigations of reverberant speech, this part of the database allows for the investigation of head shadowing influence since all recordings where made with and without the dummy head. In a first update, the database was extended to BRIRs with various azimuth angles between head and desired source. This further allows to investigate (binaural) direction-of-arrival (DOA) algorithms as well as the influence of signal processing algorithms on the binaural cues. Since dereverberation can also be applied to telephone speech, the latest extension includes (dual-channel) impulse responses between the artificial mouth of a dummy head and a mock-up phone. The measurements were carried out in compliance with the ITU standards for both the hand-held and the hands-free position. Additional microphone configurations were added in the latest extension. For the third big extension, the IKS has carried out measurements of binaural room impulse responses in the Aula Carolina Aachen. The former church with a ground area of 570m² and a high ceiling shows very strong reverberation effects. The database will successively be extended to further application scenarios.

Example

data/air_binaural_stairway_1_1_0.wav

Tables

ID	Type	Columns
brir	filewise	room, azimuth	file room azimuth data/air_binaural_aula_carolina_1_1_90_3.wav aula_carolina 90.0 data/air_binaural_aula_carolina_1_2_90_3.wav aula_carolina 90.0 data/air_binaural_aula_carolina_1_3_0_3.wav aula_carolina 0.0 data/air_binaural_aula_carolina_1_3_135_3.wav aula_carolina 135.0 data/air_binaural_aula_carolina_1_3_180_3.wav aula_carolina 180.0 67 rows x 2 columns
phone	filewise	room, mode	file room mode data/air_phone_BT_corridor_hhp.wav corridor hand-held data/air_phone_BT_office_hhp.wav office hand-held data/air_phone_BT_stairway_hhp.wav stairway hand-held data/air_phone_bathroom_hfrp.wav bathroom hands-free data/air_phone_bathroom_hhp.wav bathroom hand-held 23 rows x 2 columns
rir	filewise	room, distance, reverberation-time	file room distance reverberation-time data/air_binaural_booth_0_1.wav booth 0.5 0.08 data/air_binaural_booth_0_2.wav booth 1.0 0.11 data/air_binaural_booth_0_3.wav booth 1.5 0.18 data/air_binaural_lecture_0_1.wav lecture 2.25 0.7 data/air_binaural_lecture_0_2.wav lecture 4.0 0.72 17 rows x 3 columns

Schemes

ID	Dtype	Labels	Mappings
azimuth	float
distance	float
mode	str	hand-held, hands-free
reverberation-time	float
room	str	aula_carolina, bathroom, booth, corridor, kitchen, lecture, meeting, office, stairway	floor cover, furniture, room height, room length, room width, wall surface