d&b audiotechnik has released NoizCalc, far-field noise ‘immission’ modelling software to aid the prediction and control of noise at open-air events.
d&b cites immission as effects of emissions on the environment. ‘Emission is the putting out of something, immission is the putting in or receiving of an emission,’ thre company says. ‘An emission from a factory is an immission into the environment. Transmission describes the effects on sound propagation within defined boundary parameters.’
NoizCalc models the sound propagation of coherently emitting complex sources such as line arrays and subwoofer arrays from multiple stages in the regions outside of the audience area, and applies the results onto a 3D terrain map. This PC-based software predicts the calculated far field impact of a d&b loudspeaker set-up in the open air, by applying the ISO 9613-2 and Nord 2000 standards. Using meteorological and geographical data, NoizCalc details the environmental propagation and relative attenuation values towards the far field at a defined spectrum and level reference.
NoizCalc is the result of the collaborative efforts of d&b audiotechnik and noise consulting and software development experts SoundPlan GmbH. SoundPLAN noise applies an extended range of accredited worldwide standards along comprehensive reporting tools to satisfy the need for an official noise immission statement. The next version the software is able to import d&b system set-ups from ArrayCalc. Both NoizCalc and SoundPLANnoise import d&b ArrayCalc simulation software project files, including complex data describing the relationships between sources and their combined performance, allowing loudspeaker systems to be virtually situated and oriented within 3D terrain models for realistic prediction.
‘Our collaboration with SoundPlan comes at a time when noise immission is becoming a major consideration in the planning of outdoor events,’ says d&b Product Manager, Werner ‘Vier’ Bayer. ‘This free d&b software will enable system designers to investigate how their setup will impact on the wider area by modelling immission patterns ahead of time. NoizCalc forms the basis for a common understanding between those who create emissions: the loudspeaker system designers and technicians and the environmental noise and immission specialists, who consider the impact on the wider ecology.’
Further information and video tutorials are available along with NoizCalc downloading from d&b’s website.