Effekte von Schall in Gebäuden auf die menschliche Kognitionsleistung
- Raum- und Bauakustik,
Akustische Virtuelle Realität
Masterarbeit von Muhammad Ridwanur Rahim
It is a well-established and documented phenomenon that noise generating from inside the building (Source-Receiver in different rooms and same room) and outside the building has some negative impact on the cognitive performance of human being. Extensive researches have been carried out in this field to find how noise traverses through direct walls and flanking walls. But no work has ever been done to find this phenomenon in virtual reality. The main objective of this Master Thesis is to find out the impact of noise due to building acoustics in virtual reality. Our primary objective will be to setup a simple test in virtual reality to find out how noise impacts humans carrying out different cognitive tasks. We will use a standard memory test such as verbal short term memory recall. We will use different types of background speeches both varying in Sound Pressure Level and Speech Intelligibility. Our target is to find the impact of ISE on cognitive performance in Virtual Reality. But we wish to use ISE with changing-state characteristics. We also want to analyse the speed-accuracy trade-off when performing the test under limited time. In VR, for auralization of sound generated in a Room-Room situation requires modelling sound generation, propagation and reflection from Room-Room and through the walls (both direct and flanking). It also requires modelling the insulation characteristics of direct and flanking walls. We will use varied sound insulation levels based on different levels of speech intelligibility. Finally we would like to correlate the findings of this thesis with existing results from other researches. We wish to come to a concrete conclusion where we can assert that, in VR, human mind shows a particular reaction to a specific type of background noise and our result might or might not comply with the existing findings from other researches.