The measurement of the absorption coefficient in reverberation chambers according to the international standard ISO-354 shows a poor reproducibility between laboratories. One reason is the non-uniform distribution of absorption due to the placement of the test object. This causes shorter decay times for modes with oblique and perpendicular incidence on the absorber. Modes propagating parallel […]
Sophia Psarra The Bartlett School of Architecture University College London Venice with its many islands in the lagoon is a city that has throughout history hosted many diverse innovations. From architecture, painting and printing to cartography, hydrology and politics, Venice has never ceased to inspire the creative imagination. Five hundred years since its zenith, and […]
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 […]
Noise can cause stress, which leads to measurable physical reactions as well as it can impair intentional switching of auditory selective attention (ASA). In children, this can reduce the learning progress and thus disturb their development. The relation of measurable physical stress reactions and intentional switching of ASA is investigated in current research with the […]
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 […]
Soundscape studies are showing the importance and the benefits regarding the sonic the environment in our daily lives. The soundscape paradigm shift highlights not just negative aspects, common on environmental noise studies, but also how the sonic environment can be recovering to the welfare of communities. Thinking on the valuation of settings, past studies focused […]
Ultrasonic Metal Welding (USMW) is solid-state bonding process where two metal pieces are joined by the application of ultrasonic vibrations. This thesis focuses on the study of the sonotrode during a free run to understand the airborne sound field generated during the welding process. Simulation data are generated using COMSOL Multiphysics to model the physics […]
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 […]
Huawei is founded in 1987 in Shenzhen, China. Huawei is a leading global provider of information and communications technology (ICT) infrastructure and smart devices. Starting from the 1st of Sep in 2018, I started my internship at Huawei Technologies Germany GmbH in Dusseldorf. My internship lasts five months in total, and the activity ends on […]
Aachen based, KLANG:technologies produces Hard- and Software to deliver immersive, three dimensional in-ear monitor mixes for musicians. This is achieved using binaural technologies. The focus is to give the musician a simple to use interface. During the internship, the task was to develop a tool that can automatically measure KLANG products and determine if the […]
Over the past few decades, research began to focus increasingly on the use of spherical microphone arrays to study the spatial properties of acoustic wave fields. To estimate the plane wave incidence accurately, the unwanted effects generated by the spherical microphone array itself in the recorded sound pressure should be eliminated by radial filtering. To […]
In virtual audio, sound sources need to be modeled as realistically as possible to achieve a sense of immersion in the scene. The human auditory system performs an analysis of sound, which enables the extraction of different information to recognize and localize sound sources. There are various aspects known to result in the differences of […]
Bone conduction has a big impact on the perception of the human being. Even though headphones are used by a billion of people around the world, it was yet not analyzed if the headphones excite structure-borne sound. Structure-borne sound they could cause bone conduction or cartilage conduction and interfere with the perception of the user. […]
From October 2019 to March 2020, I worked as an intern at Device Vodafone GTM Department in Düsseldorf Huawei. Huawei Technologies Co., Ltd., whose headquarter is located in Shen Zhen China, is a multinational tech-communication company that provides telecommunications equipment and sales of consumer electronics products including smartphones. My responsibilities are mainly as a Test […]
In this thesis, the mutual information and interaction between different objective distance metrics for HRTF comparison were analyzed and evaluated. For this purpose, tools such as correlation analysis, principal component analysis and factor analysis were used. The metrics were reduced to a smaller set of measures suitable for a listening experiment, covering both spatial and […]
Ultrasonic metal welding (USMW) is a kind of solid-state bonding technique for connecting similar or dissimilar metals using extremely fast frequency oscillations (ultrasonic frequencies). However, some details of vibration during the USMW are still unclear in this study field. In this work, 27 groups of measurements on the oscillation of the sonotrode and anvil vibrations […]
Anjan Chatterjee Penn Center of Neuraesthetics University of Pennsylvania Zoom-Meeting-ID: 967 2780 6048 Password: 747785 Direct link: https://rwth.zoom.us/j/96727806048?pwd=MjlOT1YrNk1ZUGZWTEV3ZU1BS0VGUT09 People in developed countries spend over 90% of their time in built environments. Yet, we know little about its pervasive and often hidden effects on our mental state and our brain. Despite growing interest in the neuroscience […]
The acoustic scattering of surface is very important in all aspects of room acoustics like in concert halls and reverberation rooms. The acoustic propagation of sound can be calculated effectively and in high quality by geometrical simulation methods. Nevertheless, reliable scattering coefficients are needed. In this master’s thesis, the uncertainty of standardized measurement methods will […]
Akustik-Forschung