Electroacoustic reverberation enhancement
Electroacoustic reverberation enhancement (RE) is a technique to change the acoustic conditions in a room by the use of microphones, loudspeakers and signal processing units. The reverberation time or other acoustical aspects can be modified. Note that the reverberation time can only be increased, not decreased (at least over siginficant bandwidths). RE systems are often referred to as Electronic Architecture.
MCR -- Multi-Channel Reverberation, developed by Philips in the 60's
Assisted Resonance - developed in the 60'sACS - Acoustic Control System
Carmen (in French)
ERES - Electronic Reflected Energy System (by Jaffe, Holden, Scarborough Inc., check project no. 8)
LARES - Lexicon Acoustic Reinforcement and Enhancement System
RODS - Reverberation on Demand System
SIAP
VRAS - Variable Room Acoustics System
Yamaha AAS - Assisted Acoustic System