Opera house electronic libretto systems have begun to be used in some opera houses, including New York's Metropolitan Opera, Milan's La Scala, and the Crosby Theatre of The Santa Fe Opera, which provide two lines of text on individual screens attached to the backs of the seats so as to not interfere with the visual aspects of the performance. A subtle type of sound reinforcement called acoustic enhancement is used in some opera houses. Acoustic enhancement systems help give a more even sound in the hall and prevent "dead spots" in the audience seating area by "...augment[ing] a hall's intrinsic acoustic characteristics."
Coldren Opera House Coldren Opera House The Coldren Opera House is a former theater that operated in Iowa City, Iowa from 1877 until its closure in 1912. The original opening of Englert Theatre with its legitimate stage and orchestra pit, plus a huge retractable screen for motion picture presentations, coupled with a new University of Iowa auditorium in Macbride Hall, which had been opened during 1908, spelled doom for another notable Iowa City institution, the Coldren Opera House (initially called the Grand Opera House) at 105 College Street. Although calling itself an opera house, little opera was ever performed there. Rather, the name