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Juni 2022

Kahle: The Concert Hall – a machine for music? Or how to integrate acoustic design into architecture

Juni 3 @ 11:00 - 12:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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For Concert Halls, most people agree that the acoustic quality is a quintessential element of the success of the project, and often the acoustics is considered as being more important than the architectural design. Yet it should be clear that architecture and acoustics are totally interwoven, and every architectural decision will have an acoustic effect and vice versa. Even the dimensions of interest are the same in acoustics and architecture, the wavelengths of audible sound range from a few millimeters…

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Stienen: Real-time auralisation of outdoor sound propagation

Juni 3 @ 13:00 - 14:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland

Auralisation describes the process of generating and presenting audible sound using computer programs and audio hardware. Since the result is perceived naturally by the human's auditory system, a demonstration by means of auralisation is easily comprehensible and does neither require background knowledge nor expertise. Producing auralisation under real-time constraints increases the implementation demands significantly. Real-time auralisation is required in applications that respond to user interaction, for example, in interactive Virtual Reality (VR) environments. Dynamically moving sound sources and receivers evoke…

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Ercandogu: Process state estimation in ultrasonic metal welding from airborne sound recordings

Juni 9 @ 09:00 - 09:30
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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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 radiating sound may be directly related to the component vibrations. As a result, changes in the process can be monitored by detecting changes in the…

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Lu: Vibration transfer function between horn and anvil measurements in ultrasonic metal welding

Juni 9 @ 09:30 - 10:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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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 knowledge about welding process is required. In this thesis the data sets are 44 measurements on the oscillation of the horn and anvil vibrations along…

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Seitz: Intentional switching of spatial auditory selective attention in preschool children

Juni 17 @ 11:00 - 12:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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From the beginning of their auditory development, children are immediately confronted with the challenge of orienting themselves in complex acoustic situations. Whether a parent’s voice or a passing vehicle, it is crucial to distinguish an auditory signal from the acoustic environment. Spatially distributed sound sources, distracting sounds, and disturbing background noise, for example, impede this listening process. The ability to focus on the relevant target source while blocking out simultaneous distracting sounds in a multi-layered acoustic environment is known as…

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Domah: Categorisation of urban soundscapes under variable weather conditions

Juni 24 @ 11:00 - 11:30
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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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 made in the IHTA park is necessary. Unfortunately, the recordings of existing database cannot be used for auralisation, as they are oftentimes uncalibrated and lack…

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Yang: Unsicherheiten der Quellparameterschätzung aus PKW-Vorbeifahrtgeräuschen

Juni 24 @ 11:30 - 12:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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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 der Schallausbreitungsdämpfung durch Monte-Carlo-Simulationen und Sensitivitätsanalysen untersucht. Melden Sie sich hier an um die Einladung zu dem Vortrag per E-Mail zu erhalten. Register here to…

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Wenzel: The influence of varying degree of visualization on spatial audio-visual congruency effects with short-term memory performance

Juni 28 @ 10:30 - 11:30
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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When understanding and recalling spoken language, various complex processes take place in the brain. Certain circumstances can either impede or facilitate speech comprehension, e.g. visual stimuli such as lip movements or gestures. Although the field of cognitive psychology has already intensively studied short-term memory performance or listening effort in such situations, it mostly uses simple scenarios without plausible visual and auditory material. It is therefore possible that the performance of participants in such studies differs from reality. This work investigates…

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Zhu: Examining the influence of visual stimuli on auditory selective attention in a virtual classroom

Juni 28 @ 11:30 - 12:00
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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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 study was to explore a new paradigm to investigate the influence of visual stimuli on ASA. In addition, the experiment was carried out in a…

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Juli 2022

Chang: Sound transmission through ventilation openings in building facades

Juli 1 @ 11:00 - 11:30
IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid), Kopernikusstr. 5
Aachen, 52074 Deutschland
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In tropical countries, air conditioning systems are widely used to improve indoor climate. In many cases, natural ventilation can also provide thermal comfort for users with less energy consumption and better air quality as long as the pollution outdoors is not too high. However, openings in the facades for natural ventilation decrease the sound insulation. Consequently, it is important to evaluate different facade designs in order to minimize the sound transmission through possible ventilation openings (VO).  This work is aimed…

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