In this part of the database we collect results from psychoacoustic experiments run by the different labs involved in Two!Ears. In addition to the results we provide the underlying stimuli in a way that they can directly be fed into the Binaural simulator and provide the model with exactly the same audio input as the listeners experienced during the actual experiments.
Human label file format¶
The test results are called human labels in the following and the average results of the single experiments are all stored in the same way in the human label file format. This is a simple csv file, which includes the following entries:
# Description of the results stored in the file # stimuli, rating, 95% confidence interval experiments/link_to/brs_file1.wav, -0.4653, 0.0123 experiments/link_to/brs_file2.wav, 0.2738, 0.1548 ...
The file starts with a header that uses
# as a comment sign and then
includes at least three columns. The first one provides a link to the actual
BRS file used in the experiment. The second one the average result from the
experiment, this could be a mean, a median, or something else, and the third one
showing the variance of the data, in most of the cases in the form of the
confidence interval. The files could of course have more columns with additional
information, like the time the listeners needed to response or if another value
like the sound pressure level was changed during the experiment it could be
indicated in a later column.
Besides the human label files, most experiments provide the anonymised results from single listeners. The format of those data can vary, but in all cases they are provided as plain text or csv files.
2013-05-01: Coloration of a point source in Wave Field Synthesis¶
This database entry contains stimuli and results from the experiments described in [Wierstorf2014a]. In the experiment different WFS systems synthesising a point source were rated in terms of their perceived coloration compared to real point source. This was done for different audio material, namely pink noise, speech, and music and different listener positions. The results are summarised in Fig. 33 and available in the following database files:
experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_center_positon_music.csv experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_center_positon_noise.csv experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_center_positon_speech.csv experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_multiple_positions_music.csv experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_multiple_positions_noise.csv experiments/2013-05-01_wfs_coloration/human_label_coloration_wfs_multiple_positions_speech.csv
The corresponding stimuli are provided as BRS files that can be used together
with the Binaural simulator and the corresponding scene description file
wfs_coloration.xml to reproduce the exact pink noise signals from the
test. The path to the BRS files is also listed in the first column of the
human label files, so it can directly extracted from them.
|[Wierstorf2014a]||Wierstorf, H., Hohnerlein, C., Spors, S., Raake, A. (2014), “Coloration in Wave Field Synthesis,” 55th International AES Conference, Paper 5-3|
2015-10-01: Coloration of a point source in Wave Field Synthesis revisited¶
The first experiment investigating coloration in WFS had some artefacts in the stimuli for high frequencies due to the limitation coming with a finite sampling rate during the process of time delaying single signals in WFS. This time the experiment was repeated using fractional delay filter (add citation). In addition, we added a linear loudspeaker array besides the circular one used in the first experiment.
The results are available in the following files:
experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_circular_center_music.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_circular_center_noise.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_circular_center_speech.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_circular_offcenter_music.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_circular_offcenter_speech.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_linear_center_music.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_linear_center_noise.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_linear_center_speech.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_linear_offcenter_music.csv experiments/2015-10-01_wfs_coloration/human_label_coloration_wfs_linear_offcenter_speech.csv
For the following localisation experiments we provide again BRS files together with the rating results. The BRS files can be used together with the Binaural simulator on order to have the Two!Ears Auditory Model in the same situation as the listener including its ability to turn the head.
2012-03-01: Localisation of a real vs. binaural simulated point source¶
In this experiment the localisation of a real point source realised by a loudspeaker was compared to the localisation of a binaural simulation of the same source using HRTFs or BRIRs. The results are published in [Wierstorf2012]. The mean localisation results are stored in the corresponding human label file which comes together with the BRS files:
In addition, we provide the trajectory of the actual head movements, each
listener performed during the experiments in the folder
|[Wierstorf2012]||Wierstorf, H., Spors, S., Raake, A. (2012), “Perception and evaluation of sound fields,” 59th Open Seminar on Acoustics, p. 263-68|
2013-11-01: Localisation of different source types in sound field synthesis¶
In this experiment listeners localised different synthesised sources using different sound field synthesis methods and loudspeaker setups. The experiment is described in [Wierstorf2014b]. Here, we are providing the BRS files that were used for binaural simulations of the different systems and listener positions during the experiment and the corresponding rating results of the listeners.
experiments/2013-11-01_sfs_localisation/human_label_localization_wfs_ps_circular.txt experiments/2013-11-01_sfs_localisation/human_label_localization_wfs_ps_linear.txt experiments/2013-11-01_sfs_localisation/human_label_localization_wfs_pw_circular.txt experiments/2013-11-01_sfs_localisation/human_label_localization_wfs_fs_circular.txt experiments/2013-11-01_sfs_localisation/human_label_localization_nfchoa_ps_circular.txt experiments/2013-11-01_sfs_localisation/human_label_localization_nfchoa_pw_circular.txt
In addition, we provide the trajectory of the actual head movements, each
listener performed during the localisation experiment with the linear
loudspeaker array in the folder
|[Wierstorf2014b]||Wierstorf, H. (2014), “Perceptual Assessment of Sound Field Synthesis,” PhD-thesis, TU Berlin|
2015-11-01: Listening preference of popular music presented by WFS, surround, and stereo¶
We did a paired comparison preference test where listeners rated their listening preference for four different pop musical pieces presented by WFS, stereo or surround. The musical pieces were all mixed by the same person in order to try to minimize the influence of the mix on the ratings, but still trying to get the best out of every system, see [Hold2016a] for details. We provide the single and average results, the BRS files for a binaural simulation of the loudspeaker array (the experiment itself was performed using a real loudspeaker array, but for modelling purposes the binaural simulation is of interest) and the driving signals of the single loudspeakers as WAV-files [doi:10.14279/depositonce-5173]:
experiments/2015-11-01_wfs_stereo_comparison/brs/* experiments/2015-11-01_wfs_stereo_comparison/results/* experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew-wfs.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew2-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew2-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/brew2-wfs.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse-wfs.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse2-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse2-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/lighthouse2-wfs.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/sister-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/sister-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/sister-wfs.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/toynbee-stereo.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/toynbee-surround.wav experiments/2015-11-01_wfs_stereo_comparison/stimuli/toynbee-wfs.wav
|[Hold2016a]||Hold, C., Wierstorf, H., Raake, A. (2016), “The Difference Between Stereophony and Wave Field Synthesis in the Context of Popular Music,” 140th AES Convention, Paper 9533|