Context types in grammaticalization as constructions

In recent grammaticalization studies, the notion of “context types” has been employed to describe the successive diachronic stages that are associated with grammaticalization processes. It has been shown that a new grammatical function does not arise homogenously in all uses of the linguistic item concerned, but in its origin is bound to specific linguistic “contexts” or “constructions”. However, the notions of “context” as well as “construction” differ greatly among scholars, and research into the impact of constructions in grammaticalization scenarios, and into ways to formalized context types and constructions for diachronic purposes has only begun. The present study advances in this direction as it links the notion of context types of grammaticalization studies with central concepts of construction grammar. Using diachronic data from grammaticalization phenomena of German, successive types of contexts, i.e. critical contexts and isolating contexts, which are typically found in grammaticalization processes, are analyzed as specific types of idiomatic constructions in the sense the term is used in construction grammar.

Investigations into Velocity and Distance Perception Based on Different Types of Moving Sound Sources with Respect to Auditory Virtual Environments

The characteristics of moving sound sources have strong implications on the listener's distance perception and the estimation of velocity. Modifications of the typical sound emissions as they are currently occurring due to the tendency towards electromobility have an impact on the pedestrian's safety in road traffic. Thus, investigations of the relevant cues for velocity and distance perception of moving sound sources are not only of interest for the psychoacoustic community, but also for several applications, like e.g. virtual reality, noise pollution and safety aspects of road traffic. This article describes a series of psychoacoustic experiments in this field. Dichotic and diotic stimuli of a set of real-life recordings taken from a passing passenger car and a motorcycle were presented to test subjects who in turn were asked to determine the velocity of the object and its minimal distance from the listener. The results of these psychoacoustic experiments show that the estimated velocity is strongly linked to the object's distance. Furthermore, it could be shown that binaural cues contribute significantly to the perception of velocity. In a further experiment, it was shown that - independently of the type of the vehicle - the main parameter for distance determination is the maximum sound pressure level at the listener's position. The article suggests a system architecture for the adequate consideration of moving sound sources in virtual auditory environments. Virtual environments can thus be used to investigate the influence of new vehicle powertrain concepts and the related sound emissions of these vehicles on the pedestrians' ability to estimate the distance and velocity of moving objects.