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Duba, R. (author), Kootte, B.W. (author)This thesis describes the design of a sound localization algorithm in audio-based games for visually impaired children. An algorithm was developed to allow real-time audio playback and manipulation, using overlapping audio blocks multiplied by a window function. The audio signal was played through headphones. Multiple sound localization cues are...bachelor thesis 2015
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Van Putten, F. (author), Schellekens, D.H.M. (author)De verstaanbaarheid van de aanwezigen bij teleconferenties is minder dan bij gesprekken waarbij beide partijen zich in \'e\'en ruimte bevinden, aangezien stoorsignalen net zo goed worden opgenomen en verder de ruimtelijke informatie van de spraak verloren gaat. Een systeem werd ontworpen dat real-time bepaalt uit welke richting iemand spreekt,...bachelor thesis 2014
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Huijbregts, L.C.A. (author), Jongepier, M.A. (author)Public Address systems that include a setup with at least one microphone and speaker can suffer from acoustic feedback. This results in an annoying howling effect which can damage hardware and human hearing. To solve this issue, an adaptive filter that estimates the feedback path and uses this estimate to cancel the feedback can be designed....bachelor thesis 2020
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Khalik, Z. (author), Gercekcioglu, A. (author)Monitoring the heart rate using PPG signals that is worn on the wrist has the downside that it is susceptible to motion. The device on the wrist moves along with the motions of the arm, consequently creating artifacts in the measurement. There are many signal processing techniques that can remove these artifacts. This thesis discusses one of the...bachelor thesis 2016
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Weustink, C.A. (author), de Vries, J.W. (author)The most promising method for acoustic feedback control in public address systems is adaptive feedback cancellation (AFC). This approach is based on making an estimation of the room impulse response, which is used to subtract an estimate of the feedback from the microphone signal. A postfilter is often used to improve the performance of such an...bachelor thesis 2020
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Coppoolse, J.T. (author), Van Dam, W.J.L. (author)This thesis was made for the Bachelor Graduation Project (Electrical Engineering). The purpose of the project was to design an audio-based game for visually impaired children. In this thesis the gameplay and the graph- ical user interface are designed. We choose to make a simplified dungeon crawler in the programming language Python. We designed...bachelor thesis 2015
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van Es, Tim (author), Helfferich, Florens (author)Atrial fibrillation (AF) is the most common type of cardiac arrhythmia occurring in around 0.5% of the world population. AF is characterized by the rapid and irregular beating of the atrial chambers of the heart, which can cause lead to strokes and other heart-failures. To prevent these consequences the early detection of AF is paramount. Using...bachelor thesis 2021
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- Generowicz, B. (author), Wesdijk, X. (author) bachelor thesis 2016
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Kos, C.H. (author), Bekkering, M.C. (author)This report is written as part of the Bachelor Graduation Project in the third year of the Electrical Engineering Bachelor programme at the Delft University of Technology. This report is made by a subgroup that is part of a larger project dedicated to finding a solution to frequency feedback in electroacoustic systems, also known as the Larsen...bachelor thesis 2020
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Noortman, J.C. (author), Bisschop, M.C. (author)In this thesis a model for sound reflections designed which is to be used in an audio-based game for visually impaired people is described. This project is a part of a three-group bachelor graduation project of six peoplein total. The three groups combined create a working game for visually impaired children, meant to be used to train the user’s...bachelor thesis 2015
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Kohabir, Amar (author), Smit, Alex (author)When symptoms of atrial fibrillation (AF), a common cardiac arrhythmia, are experienced, a Holter monitor or event recorder is used for official diagnosis. Apart from the fact that these devices are experienced as inconvenient, AF can already manifest damage in a pre-symptomatic phase. This thesis is aimed at developing a method for recording...bachelor thesis 2021
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Ballesteros Borrero, J.C. (author), Khan, T.A. (author)This bachelor’s thesis discusses the idea and implementation of real-time heart rate monitoring using photo- plethysmography (PPG) signals. PPG signals measured from the wrist are often subjected to distortion and noise. Signal processing techniques that tackle these issues were investigated and implemented. The algo- rithm of choice was JOSS....bachelor thesis 2016
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Demir, Kaan (author), Konijn, Jasper (author)The performance of wearable Photoplethysmogram (PPG) sensors is highly influenced by noise. This thesis describes the methods and results of designing a filtering systemfor PPG in context of Atrial Fibrillation (AF) detection. The developed work is an adaptive filtering system combined with a robust heart rate detection mechanism for validation...bachelor thesis 2021
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AGARWAL, SARTHAK (author)Causal inference is a familiar topic in biomedical research and a key concept in the study of connectivity in various physiological systems. This work aimed to analyse the coupling between the beat to beat parameters derived from ECG and respiration. It was the first time such an analysis was carried out in the context of finding the differences...master thesis 2021
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Kos, Cees (author)The heart is one of our vital organs. It functions by periodically contracting in a rhythmic way. Sometimes, this rhythmic behaviour is affected by abnormalities in the tissue. These conditions are referred to as cardiac arrhythmias. One kind is of specific interest, called atrial fibrillation (AF). To further study AF, methods have been...master thesis 2022
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van der Graaf, Juriaan (author)In cochlear implantation surgery, the appropriate placement of the electrode array into the cochlea is vital. Suboptimal placement of the electrode array may lead to reduced hearing performance and speech recognition after the surgery. Currently, there are methods to confirm the electrode position post-operatively (e.g. through a CT scan), but...master thesis 2019
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Riemens, Ellen (author)Loudspeakers are placed in an environment unknown to the loudspeaker designers. The room influences the acoustic experience for the user. Having information about the room makes it possible to better reproduce the sound field as intended. Using microphone measurements, the location of acoustic reflectors can be inferred. Current state-of-the-art...master thesis 2021
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Yin, Yuchen (author)This thesis focuses on classifying AF and Normal rhythm ECG recordings. AF is a common arrhythmia occurring in millions of people every year, which could lead to blood clots, stroke or even heart failure. When AF is occurring, the P waves are often absent and RR intervals are often irregular. <br/><br/>This thesis proposes a new Poincaré plot...master thesis 2020
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Gerrits, M.R.J. (author)To obtain the absolute truth about the performance of a noise reduction method one requires to perform a listening experiment. As listening experiments are often time consuming and expensive there exists a need to replace these experiments by instrumental measures. Consequently, research has provided various instrumental measures which can been...master thesis 2014
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Kordes, Arthur (author)Atrial Fibrillation affects millions of people worldwide. It is associated with an impaired quality of life and an increased risk of stroke, cardiac failure and mortality. Treatments exist, but early detection and treatment is crucial, due to the progressive nature of the disease. Algorithms can help with early detection. Machine learning...master thesis 2021