This data set contains stimuli and results from a listening paired-comparison preference test. The stimuli consisted always of the same acoustic scene with three individual sources, which had different degrees of impairments. All of the stimuli are created in order to listen binaural via headphones to them. They include already a headphone compensation filter for usage with AKG K601 headphones. The stimuli were generated using a recording done by the FH Köln [1]. For details on the experiment see [2]. [1] https://github.com/ssr-scenes/fh-koeln/tree/master/anechoic/audio [2] Raake, A., Wierstorf, H., Blauert J. (2014), “A case for TWO!EARS in audio quality assessment,” Forum Acusticum