8.6 Room Response Parameters

Early refers to Early Reflections stage of the Room response which is one of the most significant stages involved in our rapid aural perception of spatial properties and sound source localisation.

Cluster refers to a secondary iteration of room response reflections and is quite significant in the cognition of room acoustics.

Tail refers to the diffuse reverberations that eventually decay in a direct relationship with the size and reflectivity of an acoustic space. The tail section of a reverb dœs not contribute much to the localisability of a sound source in a space, but instead gives a sense of depth and ambience.

Early Min

Early reflections minimum time, i.e. the time at which the early reflections start to appear, in milliseconds. This is the analogous of the ubiquitous “pre-delay” setting found on most reverberation processors. It represent the time between the direct sound and the first early reflection.

Early Max

Early reflections maximum time, i.e. the time at which these cease to appear.

Early Dist

Early reflections distribution. Determines the way early reflections are scattered in time, inside the Early Min. / Early Max. interval. The default setting of 0.5 corresponds to regularly spaced reflections, above these are more grouped towards the Early Max. value, and vice-versa.

Early Shape

Governs the amplitude rise or fall of early reflections. The default setting of 0.5 corresponds to early reflections all having the same level. This mimics an acoustical space where reflective surfaces are all located at roughly the same distance to the listener. Below 0.5 early reflections decay with time, above 0.5 they rise with time. Early reflections of decreasing level would be typical of a space where most of the reflective surfaces are grouped at a range closest to the listener.

Cluster Min

See Early Min. Please keep in mind the cluster is fed with the input of the early reflections processor section, as is shown accordingly on the display.

Cluster Max

See Early Max.

Cluster Distribution

See Early Distribution.