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A Sound Reinforcement System for Multiple Conference Rooms

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This paper discusses design and application of a new two-way acoustic transducer (Patent Applied For) for use in multiple sound reinforcement systems interconnected via regular telephone lines. This device provides hands-off voice intercommunication between large numbers of attendees in several remote conference rooms. The omnidirectional microphone and loudspeakers are included in a single assembly with pickup sensitivity and output radiation adequate for most conference rooms. High gain-before-feedback is accomplished by the chosen design and by acoustic phase cancellation.

JAES Volume 18 Issue 2 pp. 184, 186, 188, 190, 194, 196; April 1970
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AES - Audio Engineering Society