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:''For the flag carrier airline of Romania, see TAROM. For the satellite, see LARES (satellite)'' LARES is an electronic sound enhancement system that uses microprocessors to control multiple loudspeakers and microphones placed around a performance space for the purpose of providing active acoustic treatment. LARES was invented in Massachusetts in 1988, by engineers working at Lexicon, Inc. LARES was given its own company division in 1988: LARES Associates. Since then, hundreds of LARES systems have been used in concert spaces and performance venues, from temporary outdoor music festivals to permanent indoor symphony halls. The LARES system has been incorporated into prefabricated practice room products offered by Wenger Corporation, and related sound-shaping algorithms, based on the LARES research, have been implemented by Lexicon for home and professional listening spaces. In 2008, LARES was reorganized into E-coustic Systems, offering the familiar LARES products alongside new conference room and sound reinforcement systems. ==History== Dr. David Griesinger and Steve Barbar developed LARES in 1988 while working at Lexicon, originally located in Waltham, Massachusetts. Lexicon had become respected for its digital reverberation products used for professional sound recording and concert sound reinforcement. The name LARES is an acronym of Lexicon Acoustic Reinforcement and Enhancement System. In 1989, Griesinger and Barbar, at the request of acousticians Neil Muncy and Robert Tanner, installed the first production LARES system in the Elgin Theatre in Toronto. This initial system used two microphones placed at the balcony's front edge to pick up sound from the stage. The microphone signals were treated electronically, and the resulting signals were sent to 116 loudspeakers positioned in the ceiling and under the balcony. Griesinger presented a technical paper on the concept, process and results to the Audio Engineering Society.〔(AES 90th Convention. February 19–22, 1991. David Griesinger, Lexicon. ''Improving Room Acoustics Through Time-Variant Synthetic Reverberation'' )〕 A primary component of the electronic treatment was the addition of enough digital delay to make the enhanced loudspeaker output wave arrive at its target seating area at the same time or soon after the direct sound from the stage. Reverberation was digitally synthesized and added to the signal, and patented time variant signal processing was employed to overcome coloration from acoustic feedback between the microphones and loudspeakers.〔(Acoustical Society of America. 154th Meeting, November–December 2007. Ron Freiheit. ''Digitally Enhanced Practice'' )〕 Two LARES mainframes were used, one for the 60 underbalcony speakers and one for the 56 loudspeakers in the main ceiling.〔(E-coustic Systems. ''Elgin Theatre'' )〕 On April 28, 1992, Griesinger was issued a patent for LARES entitled "Electroacoustic system". In 1993, LARES was nominated for but did not win a TEC Award in the category of "Signal Processing Technology".〔(Mix Foundation for Excellence in Audio. 1993 TEC Awards: Nominees and Winners. )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「LARES」の詳細全文を読む スポンサード リンク
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