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Slide 1
Slide 2
The use of outdoor sound propagation modelling for auralizing
road traffic noise results from the LISTEN-project Jens Forssn
Slide 3
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 A Multidisciplinary Research
Project Commercial partners F-Ingemansson AB Rambll Denmark A/S WSP
Sweden AB LISTEN Auralization of Urban Soundscapes
Slide 4
Auralization basics In general (the heart of auralization): r
is received (mono) signal s is source signal h is impulse response
(IR) of system
Slide 5
Omni-directional point source at low speed, in free field Ex)
Free field IR: Tonal component: From here we see that Doppler shift
can be implemented as resampling
Slide 6
Doppler shift by resampling First sample Second sample f = 500
Hz L = 10 m U = 70 km/h
Slide 7
Propulsion noise (framdrivningsbuller) Engine, transmission,
air intake, exhaust Rolling noise (dck-vgbuller) Depends on
combination of tyre and road Road vehicle sources Extracted from
recordings
Slide 8
Air attenuation Ground effect Directivity Doppler effect
Distance/spherical spreading HRTF* (HRTF of recorded signal: )
Auralization process starting from given source signal Auralization
process Including: *head related transfer function
Slide 9
In Summary The LISTEN project: Auralization of urban
soundscapes Methods for perceptual validation of auralization [see
final report] LISTEN-auralizations of car passages shown to have
high perceptual validity [see final report]