Transfer-Function Measurement Using Maximum-Length Sequences

Rife DD, Vanderkooy J. Transfer-Function Measurement Using Maximum-Length Sequences. In: AES Convention 83. Audio Engineering Society; 1987. Paper 2502. Available from: https://aes.org/publications/elibrary-page/?id=4900

@inproceedings{Rife1987_4900,
  author = {Rife, Douglas D. and Vanderkooy, John},
  title = {{Transfer-Function Measurement Using Maximum-Length Sequences}},
  booktitle = {AES Convention 83},
  note = {Paper 2502},
  year = {1987},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=4900}
}

TY  - CPAPER
TI  - Transfer-Function Measurement Using Maximum-Length Sequences
AU  - Rife, Douglas D.
AU  - Vanderkooy, John
T2  - AES Convention 83
M1  - Paper 2502
PY  - 1987
DA  - 1987/10/06
UR  - https://aes.org/publications/elibrary-page/?id=4900
PB  - Audio Engineering Society
LA  - en
AB  - A comprehensive analysis of transfer-function measurement methods based on maximum-length sequences is presented. Maximum-length sequence stimulated measurements employ efficient cross-correlation between input and output to recover the system impulse response. The results so obtained is shown to be identical to the system's direct response to a simple periodic square pulse but with noise and distortion immunity comparable to Time-Delay Spectrometry. By appropriate modification of the excitation signal, the system's DC component simultaneously recovered by the same cross-correlation operation. Another modification correctly measures systems containing unipolar transducers such as spark gaps and hammers. An algorithm is disclosed which computes a smoothed energy-time curve directly from the impulse response and a low-cost instrument performs these and other measurements on loudspeakers and acoustic spaces.
ER  -