This presentation discusses the advantages and limitations of using Dynamic Time Warping (DTW) to quantify the similarity between measurements of different weldings. In this project, machine vibrations and airborne sound occurring during Ultrasonic sheet Metal Welding are recorded, using two laser Doppler vibrometers and a microphone. The goal of the project is to get a better understanding of the processes that occur during […]

This talk will address the musical blind source separation problem: given multiple instrument tracks recorded together, how can each be isolated from the others given no additional knowledge about the instrument locations or sounds? There are many advantages to solving the problem: live performances can convey the energy of the performers, and the sound of […]

Auralizations of simulationed aircraft flyovers can be used to experience aircraft noise in virtual environments. Compared to averaged sound pressure levels or noise maps, listening to such an auralization provides a more sophisticated impression on how annoying the aircraft noise might be in a real scenario. For proper auralization results, the inhomogeneity of the atmosphere, […]

Ultrasonic metal welding (USMW) has received significant attention in recent years. It is particularly suitable for connecting electrotechnical components and has been widely used in various industrial applications. However, the bond quality in USMW fluctuates due to a large number of influencing variables which may affect the joint strength. The welding process should thus be […]

Teaching courses online has gained importance in the recent semesters. While lectures can often be delivered in a straight forward manner, lab courses require a specific infrastructure. This talk presents how the newly introduced RWTH JupyterHub server can be used deliver a lab course experiement - that is the TI lab course as an example […]

People use speech to communicate, sharing information, knowledge, and stories, but the act of speaking and listening is no guarantee of a clear understanding. Schools are places where speaking and listening are primary methods of communication. In Brazil, it is a common practice to design a standard classroom and replicate it across the institution, be […]

Ultrasonic Metal Welding (USMW) is a technique used for numerous industrial applications. However, the welding process is in fact poorly known, leading to unexplained variations of strength. This presentation will show some recent work about studying the welding process based on measurements and the most recent model from the literature. From the literature model, a […]

Acoustic simulations become a more and more important toolset for industry and research. For a few years now, our institute uses COMSOL Multiphysics for numerical simulations, e.g. FEM and BEM, in various fields of acoustics. For proper processing of simulation results, we usually rely on MATLAB and the ITA-Toolbox. Although COMSOL provides a MATLAB interface […]

Thanks to modern auralization methods, simulated aircraft flyovers can be experienced in virtual environments. Listening to such an auralization provides a more sophisticated impression of annoyance of aircraft noise in real scenarios than reading averaged sound pressure levels or noise maps. For proper auralization results, translation and refraction due to wind and to inhomogeneity of […]

As a basis for potential sound perception studies in outdoor environments, the PAAD group is developing a 3D model of the adjacent outdoor area to the institute. The original request was to achieve an ecologically vaild representation of the outdoor environment, including different weather characterizations. In this presentation we will present the current state of […]

Jian Kang Bartlett School of Environment, Energy and Resources University College London This talk explores putting soundscape into the intentional design process, by proposing a soundscape design framework for urban open public spaces, including four key components: characteristics of each sound source, acoustic effects of the space, social/demographic aspect of the users, and other aspects […]

The absorption coefficient is a central parameter in the room acoustic design process. It can be measured in an impedance tube for normal sound incidence or in the reverberation chamber for random incidence. To guarantee a standardized test environment for reverberation chambers, the international standard ISO 354 suggests a measurement procedure to increase the diffusivity […]