Database of single-channel and binaural room impulse responses
(RIRs and BRIRs) of a 64-channel loudspeaker array for dierent
room congurations
This database contains RIR and BRIR measurements performend in July 2014 at the Audio Lab of
the Institute of Communications Engineering, University of Rostock. The measurements are described
in detail in this publication:
Vera Erbes, Matthias Geier, Stefan Weinzierl, Sascha Spors (2015): Database of single-channel and
binaural room impulse responses of a 64-channel loudspeaker array. Proc. of the 138th Int. AES
Convention, Warsaw, Poland.
When you use our data in your work, please reference our paper and/or the DOI:
http://dx.doi.org/10.14279/depositonce-87
All data is available under the
Creative Commons Attribution-NonCommercial-ShareAlike 4.0
license
1
.
The data is provided in the Spatially Oriented Format for Acoustics (SOFA). RIRs and BRIRs are ar-
ranged according to the conventions GeneralFIRE 0.1 and MultiSpeakerBRIR 0.2, respectively. Please
refer to the specications on
http://www.sofaconventions.org
for details on the le format. A
Matlab-API is available at
http://sourceforge.net/projects/sofacoustics/
. As the BRIR les
are quite big, it is recommended to use partial loading when you do not need all data at once.
The naming scheme of the les is:
<RIR/BRIR>_<absorber conguration>_<receiver position>_Emitters1to64.sofa
Though also contained in the SOFA les, the coordinates of the loudspeakers are given in table 1 for
convenience. The origin of the coordinate system is at the centre of the array at the height of the
loudspeakers. An overview of the listening room with the loudspeaker array and the coordinate system
is given in g. 1.
Furthermore, the database contains pictures taken during the measurements inluding a series of pic-
tures of each wall and egde of the room which illustrates the positioning of absorbers. This picture
series starts at the wall with the windows and shows the other walls while turning clockwise.
Table 2 gives the reverberation times of the room in octave bands for the dierent absorber congura-
tions.
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http://creativecommons.org/licenses/by-nc-sa/4.0/
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Addition on 10th February 2016:
You can nd compensation lters for the headphone transfer
functions (HpTF) of several headphone types here:
DOI
DOI 10.5281/zenodo.45876
10.5281/zenodo.45876
These HpTF compensation lters are calculated from measurements made with the KEMAR 45BA
with large ears that has been used for this RIR and BRIR database. The raw measurements and
a Matlab script that calculates the compensation lters from the measurements is included as well.
Details and licensing terms can be found under the above DOI.
Table 1: Coordinates of loudspeaker positions relative to centre of array for all 64 loudspeakers.
z
-
coordinate is always 0. The data is arranged so that loudspeaker number 57-8, 9-24, 25-40
and 41-56 make up one side of the rectangular array.
#
x
in m
y
in m #
x
in m
y
in m
57 1.8800 -1.6900 25 -1.8800 1.6875
58 1.8800 -1.4975 26 -1.8800 1.5000
59 1.8800 -1.2500 27 -1.8800 1.2525
60 1.8800 -1.0200 28 -1.8800 1.0200
61 1.8800 -0.7725 29 -1.8800 0.7750
62 1.8800 -0.5475 30 -1.8800 0.5500
63 1.8800 -0.3025 31 -1.8800 0.3050
64 1.8800 -0.0625 32 -1.8800 0.0625
1 1.8800 0.1275 33 -1.8800 -0.1300
2 1.8800 0.3100 34 -1.8800 -0.3125
3 1.8800 0.5400 35 -1.8800 -0.5325
4 1.8800 0.7725 36 -1.8800 -0.7625
5 1.8800 1.0200 37 -1.8800 -1.0125
6 1.8800 1.2700 38 -1.8800 -1.2625
7 1.8800 1.4975 39 -1.8800 -1.5000
8 1.8800 1.6775 40 -1.8800 -1.6900
9 1.6850 1.8800 41 -1.6925 -1.8800
10 1.4950 1.8800 42 -1.5050 -1.8800
11 1.2525 1.8800 43 -1.2625 -1.8800
12 1.0200 1.8800 44 -1.0250 -1.8800
13 0.7725 1.8800 45 -0.7850 -1.8800
14 0.5475 1.8800 46 -0.5550 -1.8800
15 0.3025 1.8800 47 -0.3125 -1.8800
16 0.0575 1.8800 48 -0.0625 -1.8800
17 -0.1300 1.8800 49 0.1250 -1.8800
18 -0.3150 1.8800 50 0.3050 -1.8800
19 -0.5375 1.8800 51 0.5250 -1.8800
20 -0.7725 1.8800 52 0.7625 -1.8800
21 -1.0175 1.8800 53 1.0075 -1.8800
22 -1.2700 1.8800 54 1.2775 -1.8800
23 -1.4975 1.8800 55 1.4925 -1.8800
24 -1.6900 1.8800 56 1.6825 -1.8800
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Loudspeaker 8
x
y
z
door
windows
Loudspeaker 1
Figure 1: Loudspeaker array in room with broadband absorbers (grey cuboids) at walls and ceiling, but
not in front of the windows. During the measurement, there were additional trusses above
the loudspeakers. Coordinate system and loudspeaker numbering are indicated.
Table 2: Reverberation times (s) in octave bands for dierent absorber congurations
Absorber conguration 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz
no absorbers 1.42 1.44 1.15 0.94 0.87 0.69 0.52
without ceiling absorbers 0.37 0.40 0.38 0.37 0.38 0.32 0.27
all broadband absorbers 0.32 0.32 0.32 0.31 0.29 0.27 0.24
additional absorbers 0.29 0.23 0.21 0.25 0.22 0.20 0.17
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