Autor(es)

Alejandro Bidondo and Leonardo Pepino

URL Pública

Abstract

Room acoustic texture is defined by Beranek as the subjective impression listeners derive from the temporal and amplitude patterns of early reflections, at the receiver’s locations inside the room. Traditionally, room acoustic texture was qualified by visual inspection of the room impulse responses (RIR) or counting reflections peaks. Taking into account that the reflections in the later part of the RIR follow a Gaussian probability distribution and are totally mixed, we define the early reflections as every amplitude outlier present in a RIR, and mixing time as the instant when their cumulative energy reaches 99% of their total energy. To find outliers amplitudes, we proceeded to cancel the decay of the energy time curve (ETC) under analysis using a mobile median filter. Then, the particular echo density function (edf) is defined as the decay-cancelled outliers cumulative energy, over time. From this processing, a group of …