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Juli 2021

Palenda: Internship with Klang Technologies

Juli 23 @ 11:00 - 11:30
Zoom-Meeting

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 signal processing was performed correctly. The software framework JUCE was used in the project and primarily handled the interaction with the sound card. Furthermore, additional…

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Schwachtgen: Radial Filter Synthesis for Spherical Microphone Arrays

Juli 23 @ 11:30 - 12:00
Zoom-Meeting

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 that end, the synthesis of adapted radial filters will form the core of this research. Radial filters will be derived from both a modeled and…

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August 2021

Sanjaya: Examining the effect of HRTF magnitude and phase on sound coloration

August 13 @ 11:00 - 12:00
Zoom-Meeting

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 sound perception of the listener. Different loudness levels and source locations are two of the reasons why the difference in the perception of sound occurs.…

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Ibe: Measurement of Structure-Borne Sound Excitation by Headphones

August 27 @ 11:00 - 11:30
Zoom-Meeting

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. This thesis aims to take first steps in the characterization of the stimulated vibrations of headphones. An Laser Doppler vibrometry is used to measure the…

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Chen: Internship with Huawei Deutschland

August 27 @ 11:30 - 12:00
Zoom-Meeting

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 Engineer, cooperating with Chinese R&D team as well as with Vodafone Lab to solve the live testing related issues. I also support on in market…

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September 2021

Brozova: Examining the Interrelation and Perceptual Influence of Head-Related Transfer Functions Distance Metrics

September 3 @ 11:00 - 12:00
Zoom-Meeting

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 spectral aspects. Moreover, a listening experiment was designed to examine just noticeable differences (JNDs) and to gain first insights into various perceptual attributes (e.g. changes…

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Liu: Transfer path analysis in Ultrasonic Metal Welding based on experimental data and simulations

September 24 @ 11:00 - 12:00
Zoom-Meeting

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 along the direction of USMW between two copper layer sheets have been recorded by LaserDoppler vibrometers (LDV). Based on the recorded data sets, the ratio…

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Oktober 2021

Chatterjee: The neuroaesthetics of architectural spaces

Oktober 4 @ 15:00
Zoom-Meeting

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 of architecture, much of this scholarship has been descriptive. The typical strategy is to map knowledge of the brain onto constructs important to architecture. For…

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Chen: Incident-angle dependent measurement of sound scattering patterns

Oktober 15 @ 11:00 - 12:00
Zoom-Meeting

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 be discussed and standard measurements will be conducted. A new measurement setup will be developed to measure the scattering patterns at different incident angles. Melden…

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Hahn: Dynamic synthesis of passenger car pass-by sounds

Oktober 22 @ 11:00 - 11:30
Zoom-Meeting

Progress in the field of computer-based calculation and simulation of sound fields and acoustic propagation effects enable numerous new applications for auralisation, e.g. design of cities and buildings, noise reduction and machine learning. In addition to the consideration of audible propagation effects a realistic synthesis of the source signal is essential for the generation of an aural impression that is close to reality. In this thesis a digital synthesizer for the generation of passenger car pass-by sounds is presented, which…

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