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Variable Reverberation

(Tottori Prefectural Citizen's Cultural Center)
 Variable reverberation mechanisms are acoustic mechanisms built into the walls and ceiling of the audience area. Indispensable for adjusting the way sound moves throughout a theater, variable reverberation mechanisms help ensure ideal acoustic conditions for all kinds of events. This makes possible subtle adjustment of reverberation characteristics, enabling the creation of high-quality sound space in multi-purpose theaters.
 
Adjusting reverberation by enabling a portion of the ceiling to be raised, lowered, opened or closed
1.When second-balcony seats open 2.Second-balcony seats in the process of being closed off 3.When the third-level seats have been completely closed off, changing the sound reflection ratio of the entire theatre
Adjusting reverberation by changing the area of the sound-absorbing and reflecting surfaces of wall-mounted rotating panels
1.Normal position, with the reflective surfaces fully exposed 2.Side wall panels in the process of being rotated 3.When panels have been fully rotated, leaving the absorbing side fully exposed
Adjusting reverberation by opening and closing sound-absorbing curtains installed on audience walls and balconies
Osaka Sayama City Culture Center (Sayaka Hall)
1.Making use of the original reflective ratio of the walls 2.Opening (unfurling) sound-absorption curtains on the wall, to adjust the reflective ratio of the theater