Background traffic noise synthesis
Paper i proceeding, 2016

When planning the development of urban areas, it is important to assess the future acoustic environment. Currently, this evaluation is achieved with the help of acoustic indicators, but they do not suffice for a holistic description of the perceived sound environment. New indicators can be extracted through listening tests and analysis of different acoustic scenarios. However, generating such scenarios using auralisation models for outdoors sound propagation is often computationally highly demanding. Here, a simplified auralisation model is described, focusing on background traffic noise simulation on flat city scenarios. For computational efficiency, the proposed method partly relies on physical models for air attenuation, ground effects and spherical spreading. The doppler effect and the contribution of individual vehicle pass-bys are achieved with the help of modulation transfer functions, and spatial imagery is realised by both non-corellated phase spectra and modulation transfer functions. Power profiles from measurements are used to model rolling noise. The proposed model is assessed through listening tests against the LISTEN demonstrator on its perceived speed and distance from the listener. The perceived speed is matching better to the LISTEN between 70 kmph and 90 kmph, while above 300 m and up to 900 m from the source, the distance is more correctly guessed from the subjects.

Background traffic noise

Auralisation

Urban sound planning

Författare

Georgios Zachos

Chalmers, Bygg- och miljöteknik, Teknisk akustik

Jens Forssén

Vibroakustik

Wolfgang Kropp

Vibroakustik

Laura Estévez Mauriz

Chalmers, Bygg- och miljöteknik, Teknisk akustik

45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016, Hamburg, Germany, 21-24 August 2016

3502-3508

Ämneskategorier

Strömningsmekanik och akustik

Mer information

Skapat

2017-10-08