NASA NTRS · 19710000227
Multichannel intercom with simultaneous send/receive capability
Abstract
System, using only one amplifier and operating multiple inputs, eliminates push-to-talk requirement of previous systems and inhibits acoustical feedback by using microphones and headphones.
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Burowick, E. A.. 1971-07-01. Multichannel intercom with simultaneous send/receive capability. https://ntrs.nasa.gov/citations/19710000227
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