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Crispness, speech intelligibility, and coloration of reverberant recordings played back in another reverberant room (Room-In-Room)
Citation key Haeussler.2019
Author Haeussler, Andreas and van de Par, Steven
Pages 931
Year 2019
DOI 10.1121/1.5090103
Journal The Journal of the Acoustical Society of America
Volume 145
Number 2
Abstract This work examines the acoustical and perceptual consequences that can be found in a transfer chain consisting of a sound recorded in one room which is played back over a loudspeaker in another room. The total resulting textquotedblRoom-In-Roomtextquotedbl (RinR) response can be modelled as a convolution of the Room Impulse Response of the first and second room. Due to the convolution an increase in the reverberation time, pulse density, and a change of the temporal envelope of the early reflections can be observed, compared to a single room. In the spectral domain, the convolution results in an increase in spectral modulation strength, responsible for coloration. The listening test investigating the perceptual consequences of RinR found a decrease in perceived crispness due to reproduction in a playback room, especially for highly reverberant conditions. When within normal sized rooms the reverberation time and total source-receiver distance were kept constant, RinR and a single room condition showed no reduction in crispness. On the other hand, a strong increase in the perceived coloration was measured. Furthermore, a decrease in speech intelligibility has been found for RinR conditions, compared to single rooms (Speech Reception Threshold of 2-3 dB). This work examines the acoustical and perceptual consequences that can be found in a transfer chain consisting of a sound recorded in one room which is played back over a loudspeaker in another room. The total resulting textquotedblRoom-In-Roomtextquotedbl (RinR) response can be modelled as a convolution of the Room Impulse Response of the first and second room. Due to the convolution an increase in the reverberation time, pulse density, and a change of the temporal envelope of the early reflections can be observed, compared to a single room. In the spectral domain, the convolution results in an increase in spectral modulation strength, responsible for coloration. The listening test investigating the perceptual consequences of RinR found a decrease in perceived crispness due to reproduction in a playback room, especially for highly reverberant conditions. When within normal sized rooms the reverberation time and total source-receiver distance were kept constant, RinR and a single room condition showed no reduction in crispness. On the other hand, a strong increase in the perceived coloration was measured. Furthermore, a decrease in speech intelligibility has been found for RinR conditions, compared to single rooms (Speech Reception Threshold of 2-3 dB). // This work examines the acoustical and perceptual consequences that can be found in a transfer chain consisting of a sound recorded in one room which is played back over a loudspeaker in another room. The total resulting textquotedblRoom-In-Roomtextquotedbl (RinR) response can be modelled as a convolution of the Room Impulse Response of the first and second room. Due to the convolution an increase in the reverberation time, pulse density, and a change of the temporal envelope of the early reflections can be observed, compared to a single room. In the spectral domain, the convolution results in an increase in spectral modulation strength, responsible for coloration. The listening test investigating the perceptual consequences of RinR found a decrease in perceived crispness due to reproduction in a playback room, especially for highly reverberant conditions. When within normal sized rooms the reverberation time and total source-receiver distance were kept constant, RinR and a single room condition showed no reduction in crispness. On the other hand, a strong increase in the perceived coloration was measured. Furthermore, a decrease in speech intelligibility has been found for RinR conditions, compared to single rooms (Speech Reception Threshold of 2-3 dB).
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