Impulse Response Measurements using MLS Technique on Nonsynchronous Devices

Novak A, Rund F, Honzik P. Impulse Response Measurements using MLS Technique on Nonsynchronous Devices. J Audio Eng Soc. 2016;64(12):978-987. doi:10.17743/jaes.2016.0050

@article{Novak2016_18532,
  author = {Novak, Antonin and Rund, Frantisek and Honzik, Petr},
  title = {{Impulse Response Measurements using MLS Technique on Nonsynchronous Devices}},
  journal = {Journal of the Audio Engineering Society},
  volume = {64},
  number = {12},
  pages = {978--987},
  year = {2016},
  month = dec,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2016.0050},
  url = {https://doi.org/10.17743/jaes.2016.0050}
}

TY  - JOUR
TI  - Impulse Response Measurements using MLS Technique on Nonsynchronous Devices
AU  - Novak, Antonin
AU  - Rund, Frantisek
AU  - Honzik, Petr
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 64
IS  - 12
SP  - 978
EP  - 987
PY  - 2016
DA  - 2016/12/06
DO  - 10.17743/jaes.2016.0050
UR  - https://doi.org/10.17743/jaes.2016.0050
PB  - Audio Engineering Society
LA  - en
AB  - Maximum-length sequences (MLS) are widely used for measurement of impulse responses of linear time-invariant systems in acoustic and audio systems. It is usually believed that one of the drawbacks of the MLS technique is a requirement of synchronized devices used for the generation and acquisition of the MLS signals. This study shows that the MLS technique can easily be improved and applied to devices that are not synchronous, or operate at different sampling frequencies. To show the efficiency of the proposed modification to MLS technique, the authors provided several experiments, as for example, a measurement with devices working at 44.1 kHz on the generation side and 96 kHz on the acquisition side, or a measurement of the frequency response function of an inexpensive mobile phone in which the synchronous clocking is not possible. Modifications to the classical MLS method are easy to implement and do not require excessive computational cost.
ER  -