Abstract:Many performing art centers and multipurpose halls with poor acoustics cannot be improved for economical reasons by architectural correction works or by mechanical moving devices. The principle of virtual acoustic wall [Guicking et al., J. Acoust. Soc. Am. 78 (1985)] has been successfully applied to control the reflectivity and diffusivity of concert halls existing walls. Several independent active cells composed of a microphone, an electronic unit, and a loudspeaker form a virtual wall. By appropriately contr… Show more
“…A number of electronic systems have been developed over the last 40 years [11][12][13][14][15][16][17][18][19][20][21][22]. These systems may be broadly classified into two groups.…”
Section: Electronic Control Of Auditorium Acousticsmentioning
confidence: 99%
“…Systems in which the microphones are placed throughout the room to detect the reverberant sound are able to alter such global properties of the room acoustics as loudness, reverberation time, and envelopment. These are termed non-in-line systems because they use the regeneration that occurs between the loudspeakers and microphones in a controlled manner [19][20][21]. The microphones in a non-in-line system are not placed to detect high levels of direct sound.…”
Section: Electronic Control Of Auditorium Acousticsmentioning
“…A number of electronic systems have been developed over the last 40 years [11][12][13][14][15][16][17][18][19][20][21][22]. These systems may be broadly classified into two groups.…”
Section: Electronic Control Of Auditorium Acousticsmentioning
confidence: 99%
“…Systems in which the microphones are placed throughout the room to detect the reverberant sound are able to alter such global properties of the room acoustics as loudness, reverberation time, and envelopment. These are termed non-in-line systems because they use the regeneration that occurs between the loudspeakers and microphones in a controlled manner [19][20][21]. The microphones in a non-in-line system are not placed to detect high levels of direct sound.…”
Section: Electronic Control Of Auditorium Acousticsmentioning
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