Automatic Noise Filter for Telephone Lines

Burwen RS. Automatic Noise Filter for Telephone Lines. In: AES Convention 49. Audio Engineering Society; 1974. Paper 999. Available from: https://aes.org/publications/elibrary-page/?id=2494

@inproceedings{Burwen1974_2494,
  author = {Burwen, Richard S.},
  title = {{Automatic Noise Filter for Telephone Lines}},
  booktitle = {AES Convention 49},
  note = {Paper 999},
  year = {1974},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=2494}
}

TY  - CPAPER
TI  - Automatic Noise Filter for Telephone Lines
AU  - Burwen, Richard S.
T2  - AES Convention 49
M1  - Paper 999
PY  - 1974
DA  - 1974/09/06
UR  - https://aes.org/publications/elibrary-page/?id=2494
PB  - Audio Engineering Society
LA  - en
AB  - A signal-actuated variable filter reduces noise by 6 to 20 dB while improving the subjective quality of telephone signals. The system consists of a combination of a fixed band-pass filter, an automatic low-pass filter, a low-level expander, and an adjustable equalizer.
ER  -