| dc.description.abstract | The Triffid is a new 800 capacity live music venue in the inner Brisbane suburb of Newstead, consisting of a conversion of a WW2-era ‘Nissen Hut’ type warehouse and an adjacent beer garden. Acoustic challenges included sound insulation design to allow performance by bands in the live room at levels above 100 dB(C) while keeping within the structural capacity of the 70-year old building structure. The semi-cylindrical room cross-section was a particular challenge for the room acoustic design of the live room, coupled with the architectural desire to preserve the visual look of the existing room with its concave shape and exposed radial ‘rib’ beams. The room acoustic design for the Triffid includes an innovative two-stage design solution involving hand-perforating the existing roof structure to act as a tuned resonant sound absorber, with a new roof structure external to the building to provide the required sound insulation. Additional internal room acoustic treatments were designed using the transfer-matrix absorption prediction method and modelled using the Odeon room acoustics software package. Concurrent to the main venue design, a partial roof structure for the adjacent beer garden was designed to control environmental noise emission from patron noise from the beer garden. A lightweight polycarbonate noise barrier design was developed for use in the beer garden enclosure. Noise emission from the beer garden was compared against published papers for the prediction of noise from small/medium crowds. The results of measurements taken in the completed beer garden compare closely to the predicted noise emission from comparable-sized groups of patrons. | en_US |
