On the Audibility of Comb Filter Distortions

Brunner S, Maempel HJ, Weinzierl S. On the Audibility of Comb Filter Distortions. In: AES Convention 122. Audio Engineering Society; 2007. Paper 7047. Available from: https://aes.org/publications/elibrary-page/?id=14032

@inproceedings{Brunner2007_14032,
  author = {Brunner, Stefan and Maempel, Hans-Joachim and Weinzierl, Stefan},
  title = {{On the Audibility of Comb Filter Distortions}},
  booktitle = {AES Convention 122},
  note = {Paper 7047},
  year = {2007},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14032}
}

TY  - CPAPER
TI  - On the Audibility of Comb Filter Distortions
AU  - Brunner, Stefan
AU  - Maempel, Hans-Joachim
AU  - Weinzierl, Stefan
T2  - AES Convention 122
M1  - Paper 7047
PY  - 2007
DA  - 2007/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14032
PB  - Audio Engineering Society
LA  - en
AB  - Superpositions of delayed and undelayed versions of the same signal can occur at different stages of the audio transmission chain. Often it is a result of multiple microphone signals, sound reflections on walls or latencies in digital signal processing leading to comb-filter-shaped, linear distortions. The measurement of a hearing threshold for this type of distortion with its dependance on reflection delay, relative level and the type of audio content can be the basis for boundaries in everyday recording practice below which undesired timbral distortions can be neglected. Therefore, listening tests were conducted to determine the just noticeable difference for three stimulus categories and different time delays between direct and delayed signal from 0.1 ms to 15 ms, equivalent to 0.03 - 5.15 m of sound path difference, and to reveal the underlying sound qualities. The results show that comb-filter distortions can still be audible if the level of the first reflection is more than 20 dB lower than the level of the direct sound.
ER  -