A Reexamination of the S/N Question for Systems with Time-Varying Gain or Frequency Response

Blesser BA, Ives F. A Reexamination of the S/N Question for Systems with Time-Varying Gain or Frequency Response. J Audio Eng Soc. 1972;20(8):638-641. Available from: https://aes.org/publications/elibrary-page/?id=2038

@article{Blesser1972_2038,
  author = {Blesser, Barry A. and Ives, Fred},
  title = {{A Reexamination of the S/N Question for Systems with Time-Varying Gain or Frequency Response}},
  journal = {Journal of the Audio Engineering Society},
  volume = {20},
  number = {8},
  pages = {638--641},
  year = {1972},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=2038}
}

TY  - JOUR
TI  - A Reexamination of the S/N Question for Systems with Time-Varying Gain or Frequency Response
AU  - Blesser, Barry A.
AU  - Ives, Fred
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 20
IS  - 8
SP  - 638
EP  - 641
PY  - 1972
DA  - 1972/10/06
UR  - https://aes.org/publications/elibrary-page/?id=2038
PB  - Audio Engineering Society
LA  - en
AB  - A new definition of S/N is proposed in order to evaluate systems whose noise is a function of the signal, such as compressors, expanders, and dynamic noise filters. This new definition defines S/N as the ratio of short-term average signal to noise, instead of the usual definition of the maximum signal to the noise in the basence of signal. A pilot psychophysical investigation shows that a system need have only 52 dB S/N in order for the noise to remain undetectable. For wide dynamic-range classical music this translates into a ratio of 79 dB using the classical definition. The data also predict the optimum compander characteristics for noise reduction systems.
ER  -