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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231222T110000
DTEND;TZID=Europe/Berlin:20231222T113000
DTSTAMP:20260426T060425
CREATED:20231221T104617Z
LAST-MODIFIED:20231221T104617Z
UID:2911-1703242800-1703244600@blog.rwth-aachen.de
SUMMARY:Kamps: Synthesis of aircraft sound emission for auralization
DESCRIPTION:Aircraft sound emissions are often associated with health risks for humans. Consequently\, reducing the noise levels has been a research goal for many years. However\, a simple level reduction does not consider the impact that specific characteristics of aircraft sound might have on noise annoyance. This issue is addressed by the auralization of aircraft noise as it investigates the causes of noise annoyance based on human perception of aircraft sound emissions through studies conducted in virtual environments. In this thesis\, a MATLAB-based aircraft sound emission synthesizer is developed\, using semi-empirical prediction models for airframe\, jet\, fan\, and high-pressure compressor noise sources. The synthesizer independently generates noise from each component. The received sound can then be obtained at any spacial point assuming free-field conditions. To improve user-convenience\, a graphical user interface is developed\, providing the flexibility to choose and synthesize specific noise sources. The synthesized spectra of broadband noise components closely match the predicted levels within ±2dB in the dominant frequency bands. The synthesized overall sound pressure levels of the tonal sources precisely align with the predicted values. However\, specific sound pressure levels in the spectrum differ from the desired ones by a maximum of ±4dB. Additionally\, the source power and power spectral density of each noise source are calculated. It is observed that combination tone noise and jet shock noise dominate and that the source power is distributed fundamentally differently across the frequency domain for fan\, airframe\, and jet noise. The input parameters for the prediction models are determined based on a typical aircraft cruising scenario. Given the complexity of the input parameters\, only plausible values could be determined. Hence\, the synthesis and sound power results provide a useful impression but may not fully represent the actual conditions. \nMelden Sie sich hier an um Einladungen zu den Kolloquium-Vorträgen per E-Mail zu erhalten.\nRegister here to receive the invitations to colloquium talks via e-mail. \nZoom-Meeting-ID: 954 4073 3814\nPasswort: 450783
URL:https://blog.rwth-aachen.de/akustik/event/kamps-synthesis-of-aircraft-sound-emission-for-auralization/
LOCATION:IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid)\, Kopernikusstr. 5\, Aachen\, 52074\, Deutschland
CATEGORIES:Verteidigung Bachelorarbeit
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231222T113000
DTEND;TZID=Europe/Berlin:20231222T120000
DTSTAMP:20260426T060425
CREATED:20231221T104712Z
LAST-MODIFIED:20231221T104712Z
UID:2913-1703244600-1703246400@blog.rwth-aachen.de
SUMMARY:Zhu: Emulation of RRAM crossbar array on FPGA Platform
DESCRIPTION:RRAMs (Resistive Random Access Memory) have resistive switching characteristics and show potential for fast speeds\, high energy efficiency\, and three-dimensional stacking. We aim to overcome the limitations of traditional von Neumann architecture by employing RRAM for in-memory storage and computation. Considering the widespread use of Deep Neural Networks (DNNs) in complex tasks\, we target the energy-intensive Vector-Matrix Multiplication (VMM) in DNNs\, leveraging a resistive crossbar with RRAM to perform computations within the memory and reduce data transfers. \nTo address challenges in the early stages of RRAM crossbar array model design\, we introduce FPGA-based emulation. This approach utilizes FPGA’s configurable nature and hardware resources to enhance parallelism. We observed a substantial reduction in emulation time on FPGA compared to simulation time for the 128 x 128 crossbar size\, approximately by a factor of 365. \nMelden Sie sich hier an um Einladungen zu den Kolloquium-Vorträgen per E-Mail zu erhalten.\nRegister here to receive the invitations to colloquium talks via e-mail. \nZoom-Meeting-ID: 954 4073 3814\nPasswort: 450783
URL:https://blog.rwth-aachen.de/akustik/event/zhu-emulation-of-rram-crossbar-array-on-fpga-platform/
LOCATION:IHTA Seminarraum (60 Persons) and Zoom-Meeting (Hybrid)\, Kopernikusstr. 5\, Aachen\, 52074\, Deutschland
CATEGORIES:Vortrag Praxissemester
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