From the New Scientist website : "The clatter of a dropped trash can and the crash of a cymbal – both easily recognisable sounds.
That's why computer games or CGI movies that feature such noises use samples recorded from life, not generated by software as the graphics have been. It would take weeks of intense computing to synthesise the sound of a single cymbal clash.
New methods developed at Cornell University in Ithaca, New York, change that and could make objects in games and movies sound more like those in real life. Thin shells