Muhammad Imran: Building Acoustics – Auralization, Perception and Virtual Reality

17. August 2018 | von
2019-03-15 um 11:00 – 12:00
Institut für Technische Akustik
Kopernikusstraße 5
52074 Aachen

In the built environment, there is a concern about steadily growing high annoyance due to noise in private dwellings as well as in commercial work sites that leads towards reduced power of concentration during physical or mental work, and disturbance of sleep. The studies show that people are exposed to the noises from neighbours which causes consequences of disturbances in communication and sleep, physical or mental work imparities, and the disturbances in conversation or listening to the TV or radio in private dwellings as well as communication in office premises.

There exist different standards that describe the performance of buildings in terms of sound level reduction indices in the form of a single number value and/or frequency dependent curves, however, it can be assumed that these quantities are insufficient to describe the real situation for the perception of noise. Therefore, there is an opportunity in developing a novel real-time building acoustics auralization platform based on detailed models of ISO standards and available measurements, integrated with virtual reality (VR) systems, to accurately realize the perception and evaluation of noise and comfort.

The auralization of sound insulation between the adjoining rooms in VR-environments describes the sound transmission between enclosures, where sound insulation prediction methods are applied for a high quality auditory stimuli. In this context, a real-time building acoustic auralization framework in 3D audio-visual technology is the aim of our research project to introduce more realism and contextual features into psychoacoustic experiments.

The research focuses on describing the design and implementation of this framework that is a vital part of 3D-immersive sound rendering VR-Systems. This auralization framework relies on up-to-date knowledge of building acoustics techniques and enables a physically accurate airborne sound insulation auralization in virtually constructed environments, including important effects such as sound transmission, bending wave effects, source directivities, and source/receiver room acoustics. In spite of this realistic sound insulation rendering between adjoining rooms, not only the indoor sources are supported at runtime, but also outdoor moving sources such as vehicles.

In this way, a real-time auralization framework is possible to analyse the performance of building elements and to evaluate the noise and comfort levels for building structures in an authentic manner in real-time. This framework would allow the test subjects to perform any task of daily life of work or learning under conditions of usual behaviour and movement. Therefore, it is intended to create more realistic noise perception tests in real-time virtual reality environment than simply asking for “annoyance” in questionnaires in listening tests.

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