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Jens Forss én

The use of outdoor sound propagation modelling for auralizing road traffic noise – results from the LISTEN-project. Jens Forss én. LISTEN – Auralization of Urban Soundscapes. A Multidisciplinary Research Project. Research partners …Stockholm University (coordinator)

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Jens Forss én

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  1. The use of outdoor sound propagation modelling for auralizing road traffic noise – results from the LISTEN-project Jens Forssén

  2. LISTEN – Auralization of Urban Soundscapes A Multidisciplinary Research Project Research partners …Stockholm University (coordinator) …Chalmers University of Technology …KTH Royal Institute of Technology …the Interactive Institute …Konstfack University College of Arts, Crafts and Design Public partners …Swedish Road Administration …Swedish Rail Administration …City of Stockholm Commercial partners …ÅF-Ingemansson AB …Ramböll Denmark A/S …WSP Sweden AB

  3. Auralization – basics In general (the heart of auralization): r is received (mono) signal s is source signal h is impulse response (IR) of system

  4. Omni-directional point source at low speed, in free field Tonal component: Ex) Free field IR: From here we see that Doppler shift can be implemented as resampling

  5. First sample Second sample Doppler shift by resampling f = 500 Hz L = 10 m U = 70 km/h

  6. Road vehicle sources Extracted from recordings Propulsion noise (framdrivningsbuller) • Engine, transmission, air intake, exhaust… Rolling noise (däck-vägbuller) • Depends on combination of tyre and road

  7. Auralization process Auralization process starting from given source signal Including: • Air attenuation • Ground effect • Directivity • Doppler effect • Distance/spherical spreading • HRTF* (HRTF of recorded signal: ) *head related transfer function

  8. In Summary The LISTEN project: Auralization of urban soundscapes Methods for perceptual validation of auralization [see final report] LISTEN-auralizations of car passages showntohavehighperceptualvalidity[see final report]

  9. Funded by:

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