authors: Mathieu Lagrange, Gary Scavone, Philippe Depalle,
abstract:
This paper introduces an analysis/synthesis scheme that aims at
reproducing sounds generated by the sustained contact between rigid
bodies. This scheme is rooted on a source/filter decomposition of the
sound where the filter is described as a set of modal resonances and
the source is described as a set of impulses representing the energy
transfer between the interacting objects.
Compared to impacts, more sustained contact like rolling and sliding
make the estimation of the parameters of the source/filter model
challenging mainly because of two issues. First, the objects are
almost continuously interacting, making the observation of the modes
of the vibrating structures more difficult. The second is that the
structure of the source is generally unknown and has therefore to be
modeled in a generic way. The proposed analysis/synthesis scheme
combine advanced analysis techniques for the estimation of the filter
and a flexible model of the source. It allows the modeling of a wide
range of sounds. Examples are presented for objects of various shapes
and sizes rolling or sliding over plates of various materials. In order
to demonstrate the versatility of the approach, the system is also
considered for the modeling of various sounds produced by percussive
musical instruments.