东京新国家歌剧院的声学设计

Acoustical design of the opera house of the New National Theatre, Tokyo, Japan

日本东京新国家歌剧院（ＮＮＴ歌剧院）容座 １８１０，容积 １４５００ ｍ３，（大幕开启时的）满场混响时间 １．５ ｓ。正厅池座基本是长方形，３组眺台的水平截面为扇形，而不同高度的跳台的挑口饰也组成一个长方形。设计上的独特之处在于，舞台前上方的大型弯曲的反射板，与３组左右侧眺台靠前的６个弯曲的反射面一起，构成了一个“声喇叭”。声喇叭，加上眺台外墙面和特定形状的天花板，将舞台上歌手的歌声无需电声设备就均匀分布到大部分观众座席区，而且那里歌手声音很容易盖过乐池中乐队的声音。

The New National Theatre opera house (NNT opera house) seats 1810, its volume is 14500 m3, and its reverberation time, with audience, is 1.5 s (proscenium curtain open).The main floor is almost rectangular, the three balconies have modest fan shape in plan, although the balcony facia at each level create a rectangular shape. The unique design has a large curved reflector in front of and above the proscenium and six curved reflecting surfaces at the front ends of the three side balconies to form, in combination, an 'acoustic trumpet.' Three surfaces, along with the balcony faces and the shaped ceiling, distribute, without aid of electro-acoustic equipment, the singers' voices uniformly over the seating areas from a large portion of the large stage at sound levels that easily override the orchestra in the pit.