Page D2.3. 22 October 2008                     
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    Oslo Opera

    continued

    Working closely with the acoustic design consultants — a joint venture of Arup Acoustics, which also worked on the Copenhagen Opera House, and local firm Brekke & Strand Akustikk — the architects used an intricate and extremely detailed three-dimensional model of the room to get a sense for how music would sound in the space. They used this 3D model, along with a 1:50 scale physical model, to predict the acoustic performance and tweak the design.

    "Many old [Italian] opera houses have short reverberation times, making the words sound clear but the orchestra sound dry, while modern opera houses tend to have longer reverberation time to produce more a concert-like orchestral sound," explains Rob Harris, director of Arup's global performing arts business. "The design brief in Oslo followed this trend, so the challenge for [us] was to provide the right balance between the two."

    Jeremy Newton, an auditorium acoustic designer at Arup, continues: "We needed to maximise the volume while still providing intimacy in the relatively small space. So we exposed the room structure and formed the idea of 'ears' for the room, stepping out the auditorium walls at high level above the seating tiers. The room is narrow low down, which provides clarity and intimacy, and wide at the top, which provides reverberance."

    "Because the ideal acoustics of a hall are different for different performances, the House includes a large area of curtains," Newton adds. "These can be extended into the room, using computer-controlled motors, to provide a less resonant acoustic for contemporary (electronic) opera and for the occasional amplified concert."

    On opening night, the main hall's acoustics proved outstanding. A gala performance demonstrated the striking clarity of the singers' voices, as well as the triumphant and vibrant sounds of the orchestra (who were seated below sea level).

    Despite the crowd of 1,300, which included Norway's King Harald and Queen Sonja, the space did not feel overfilled. Care had clearly been taken to ensure all visitors could enjoy a show, with good views from every seat.

    The marathon performance of nearly five hours included participation by several local choirs, many in traditional Norwegian dress, reinforcing the local political and social connections between the citizens and their opera house.

    The Future

    The Oslo Opera House is a key part of an ongoing urban redevelopment project, which at the moment has this new landmark backing onto a busy motorway, cut off from the rest of the city. It's hard to imagine how radically transformed the area will be when the roads are buried underground and the concrete turned into a green, urban park in the coming years, as is planned.

    The Opera House may have put Oslo on the map for innovative new urban cultural buildings, but its true success will come as part of a new, pedestrian-friendly quarter on the city's industrial waterfront.

    Terri Peters is a writer and designer based in London.

     

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    The Oslo Opera's material palette and forms recall the work of Scandinavian modernists, such as Alvar Aalto.
    Photo: Jaro Hollan/ Statsbygg Extra Large Image

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    The secondary performance space at Oslo Opera seats audiences of up to 400.
    Photo: Jaro Hollan/ Statsbygg Extra Large Image

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    SUBSCRIPTION SAMPLE

    The third and smallest stage at Oslo Opera serves as a rehearsal space near the main stage.
    Photo: Sn°hetta Extra Large Image

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    A sloping glazed mass projects above the main roof of the Oslo Opera, enclosing part of the lobby and the main performance hall.
    Photo: Trond Isaksen/ Statsbygg Extra Large Image

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    The Opera's exterior aluminum cladding, designed by Astrid Lovaas and Kirsten Wagle, recalls binary computer code.
    Photo: Nicolas Buisson Extra Large Image

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    Ample glazing throughout the Oslo Opera House suggests a sensitivity to the heightened need for daylight access at Scandinavian latitudes.
    Photo: Erik Berg/ Den Norske Opera & Ballett Extra Large Image

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    Oslo Opera House ground-floor plan drawing.
    Image: Sn°hetta Extra Large Image

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    Main stage plan drawing.
    Image: Sn°hetta Extra Large Image

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    Stage Two plan drawing.
    Image: Sn°hetta Extra Large Image

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    Section through Stage Two looking west.
    Image: Sn°hetta Extra Large Image

     

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