-Invisible- Sound Reinforcement with 350 Microphones

Tappan PW, Ancha RF. -Invisible- Sound Reinforcement with 350 Microphones. J Audio Eng Soc. 1970;18(3):309-314. Available from: https://aes.org/publications/elibrary-page/?id=1500

@article{Tappan1970_1500,
  author = {Tappan, Peter W. and Ancha, Robert F.},
  title = {{-Invisible- Sound Reinforcement with 350 Microphones}},
  journal = {Journal of the Audio Engineering Society},
  volume = {18},
  number = {3},
  pages = {309--314},
  year = {1970},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=1500}
}

TY  - JOUR
TI  - -Invisible- Sound Reinforcement with 350 Microphones
AU  - Tappan, Peter W.
AU  - Ancha, Robert F.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 18
IS  - 3
SP  - 309
EP  - 314
PY  - 1970
DA  - 1970/06/06
UR  - https://aes.org/publications/elibrary-page/?id=1500
PB  - Audio Engineering Society
LA  - en
AB  - The sound system in the new Seventeenth Church of Christ, Scientist in Chicago reinforces speech from any of the 764 seats, using several of the 350 concealed microphones. Signals to the 350 concealed loudspeakers are delayed to prevent pre-echo. A nontechnical operator controls the system easily via display circuits and semiautomatic switching of microphones and loudspeakers.
ER  -