Scene analysis is a relevant way of gathering informations about the structure of an audio stream. For content extraction purposes, it also provides prior knowledge that can be taken into account in order to provide more robust results for standard classification approaches. In order to perform such scene analysis, we believe that the notion of temporality is important. We study in this paper a new way of modeling the evolution over time of the frequency and amplitude parameters of spectral components. We evaluate the benefits of such an approach by considering its ability to automatically gather the components of the same sound source. The evaluation of the proposed metric shows that it achieves good performance and take better account of micro-modulations.