Akustik-Blog

In recent years, the use of virtual reality in research has greatly increased due to its ability to recreate complicated and realistic circumstances in a well-controlled laboratory environment. In this thesis the use of three different auditory cues in a auditory selective attention experiment in virtual reality is studied and validated, examining which of them […]

Over the last few years, virtual reality (VR) has emerged as a new technology that is allowing scientific research to investigate topics from another perspective. This is due to the possibility of creating more realistic scenarios in which all the variables are controlled. Thus, the conclusions taken from such research are more consistent since the […]

This paper describes the results of a subjective evaluation of classroom auralizations with different levels of detail(LOD) by a listening test. Computer Modeling of the classroom with different LOD and the auralizations are realized by using RAVEN, after which the listening test procedure and the analyzed results are presented. The task of listening test is […]

Conventional acoustic simulations are based on CAD models. The creation of the 3D model requires modeling expertise and time. Additionally, the variety of model strategies makes this process difficult to reproduce. In contrast, Photogrammetry techniques can economically achieve valid representations of rooms. However, the models created using Photogrammetry are aimed at visualization purposes. The models […]

Ultrasonic metal welding is a solid-state bonding process in which metal workpieces are exposed to high-frequency vibrations. It is an effective joining technology with a wide range of industrial applications with its unique advantages. The vibrations of mechanical parts in the machine cause fluctuations in the air pressure, thus causing sound waves to radiate. The […]

Ultrasonic Metal Welding (USMW) is a quite important welding technique, because of the relative low heat this welding process generate, it is used in numerous industrial applications. However, this welding technique have a disadvantage, the welding strength have large variance despite the same values of input machine parameters. Thus, to improve this welding technique more […]

The IHTA park is used as a case study for a lot of the institute´s research on auralisation and visualisation of urban scenes. An audio-visual model of the park already exists, which uses synthesised sounds for the dominant technical transportation sounds, while inserting recorded sounds as background sounds. Hence, a database of recorded background sounds […]

Die Hörbarmachung urbaner Lärmszenarien mittels Außenlärm-Auralisationen ist neben geeigneten Modellen zur Simulation von Schallausbreitung- und empfängern angewiesen auf Modelle von bewegten Quellen wie beispielsweise PKW. In dieser Arbeit wird die Unsicherheit der Quellparameterschätzung von Vorbeifahrtgeräuschen der Fahrzeuge untersucht. Dazu werden die realen Richtcharakteristiken des Mikrofons analysiert. Außerdem werden die Auswirkungen unsicherer Parameter bei der Berechnung […]

Auditory selective attention (ASA) is a common phenomenon which describes the ability to intentionally focus on a specific source of sound while ignoring other irrelevant sounds. Since in real life there are usually visual distractors in addition to auditory distractors, the effect of visual stimuli on ASA is also worth investigating. The purpose of this […]