14m 'Performance' Sound Dome Specifications
Dome 2: a 14m diameter, 7m-high dome (154sqM) fitted with 19 loudspeakers, designed as an acoustically ‘live’ performance arena. The venue is adequate for all genres but is better suited to performance-based works and visual music. The capacity of the 14m dome is 100 people in surround-sound performance mode, or up to 200 in rowed seating. The speaker configuration is a flat circular array of 16x Genelec 8050s. It is also fitted with 2x AS-24i Audio spotlight (sound beam) monitors for proximate sound imaging purposes, and 1x Genelec 7070 subwoofer. Repeat performances would normally be offered over the duration of a festival, and fixed media visual music would normally play in the space during the day. The space may also be used for installation purposes. The 14m dome takes 3 days to erect and 1 day to set up and test the equipment (8 people). Specialist equipment (cherry picker, crane) and building consent is also required. Please see 14M.pdf, 14m Dome Specs, and DOME-MARQUEES_ALL SIZES_CERTIFICATE documents for further details concerning the dome’s construction. N.B. The 14M dome is currently in storage, is owned by the University of Auckland, and is made available to approved SoundDome Charitable Trust projects on a case by case basis.
The unique acoustic properties of domes have been well known to architects for at least 2 millennia. Domes feature natural amplification and diffusion characteristics as well as interesting reflective properties that arise from their regular shape. For example, it is possible to create the impression that a sound source (e.g. a whispered voice) is very close to the audience by positioning it directly opposite the receiving area (the sound travels upwards, bounces across, and down in the opposite location). This effect is one of many that may be used for creative purposes. Other effects include amplification of sound sources in the central sweet-spot area, and the ability to control reflections through the central positioning of sound absorbent materials.