For several months acoustic recording devices were installed into buildings with reported noise problems to capture the noises a resident would typically experience. To determine the exact source of the noise annoyance, walls and ceilings were removed in existing buildings and acoustic source localisation methods were employed using a dispersed microphone array.
Analysis by PKA Acoustics identified individual noises and their location within the targeted building structure. This process singled out the noise emitting from the internal wall framing and was cross referenced against wind data recorded from the Australian Bureau of Meteorology.
Analysis concluded that noise annoyance occurred mostly during high wind events. The high winds induce aggressive vibration in the building structure, generating a creaking noise at the head track. Due to the tension caused by the uneven concrete substrate this noise has been measured at levels reaching 58db.
From the evidence discovered during Studco’s studies, it became clear that new problems require new thinking. Using 3D modelling and finite element analysis; the Studco Research & Innovation Team collaborated to produce a practical solution to noise annoyance in internal walls. Initial digital prototypes were tested through construction simulations to verify the performance in high tension applications.
Emphasis was placed on removing the tension from the metal components in the wall system and isolating metal-on-metal connections, whilst still achieving the desired structural, acoustic and fire rating outcomes of the wall system. The final prototypes were subjected to our verification processes which included critical appraisal from stakeholders across the full spectrum of the construction industry.