Development of the Experimental Design for the Validation of EEG Source Localization with fMRI: Application of a Haptic Robot to Identify Active Neuronal Ensembles

Various source localization algorithms exist to perform localization with High Density (HD)-ElectroEncephaloGraphy (EEG). However, validation of these EEG source localization algorithms is lacking. The current gold standard for source localization in the brain is functional Magnetic Resonance Imaging (fMRI) by calculating the difference in...

GSL-Bench: High Fidelity Gas Source Localization Benchmarking

Gas Source Localization (GSL) is a challenging field of research within the robotics community. Existing methods vary widely and each has its own strengths and weaknesses. Existing GSL evaluations vary in environment size, wind conditions, and gas simulation fidelity, thereby complicating objective comparison between algorithms. They also lack...

To Find A Mocking Bird: Urban Bird Watching Product Design for Leica Sport Optics

Bird observation, as one of the most popular nature exploration activities in Europe, has a large user group, a profitable market and contributes positively to the environment. Optical devices are almost a necessity for bird observation since they provide a magnified view with vivid details at a far distance. <br/>Leica, a premium product...

AudioLocNet: Deep Neural Network Based Audio Source Localization for Inter Robot Localization

For my Master’s thesis, I developed and trained an audio-based localization system for indoor localization called AudioLocNet. AudioLocNet is based on convolutional neural networks and maps recordings from a small(10cm diameter) microphone array to a grid of locations around said array. AudioLocNet was made to be used by swarms of small robots...

High Resolution Model-Independent Carbon Monoxide Emission Localization and Characterization Using TROPOMI

Binaural beam-forming with dominant cue preservation for hearing aids

For people with hearing impairment, it is important to have good speech intelligibility, while also being able to localise the sound sources. Many beam-forming algorithms for hearing aids have been proposed, that minimise the noise, in combination with spatial scene preservation of the target and the interferers. By constraining the spatial cues...

Source localization of auditory steady state responses to monaural and binaural beats

Background: When two acoustic sinusoids of slightly different frequencies are presented in the same ear, the listener perceives a beating sound with a rate the difference frequency between the two sinusoids. In the dichotic presentation of two acoustic sinusoids with slightly different frequencies, separately at the two ears, the listener...

Separating individual finger activity when performing force tasks using EEG source localization methods

Electroencephalography (EEG) source localization has been applied in the development of braincomputer interfaces to control hand prostheses. When performing fine movements, our brain uses sensory feedback regarding position, velocity, and force to improve performance. Understanding the cortical mechanisms underlying individual finger movements...

Room Geometry Estimation from Acoustic Echoes

Estimating a room geometry using multiple microphones rises an echoes labeling problem. Two recent methods called the graph-based and the subspace-greedy methods have shown their capability in solving this problem. The graph-based method attains a good accuracy but suffers in maintaining the computational cost when the number of microphones is...

Evaluation of Acoustic Emission Monitoring of Existing Concrete Structures

An increasing number of existing structures are approaching the end of their technical service life. Therefore, monitoring these structures to get the information of their health condition, which is called structural health monitoring (SHM), is becoming more significant. In SHM, acoustic emission (AE) technique shows promising features in...

Neural Dynamics based on EEG and diffusion MRI: Potential in studying stroke

After stroke, functional recovery may be promoted during the first six months through rehabilitation. Several events are thought to lead to regaining lost functions, among which the remapping of affected limbs to other regions of the cortex is a frequent occurrence. High spatial resolution brain imaging techniques, like magnetic resonance...

Identification of Room Boundaries for Sound Field Estimation

Echoes generated by the sound reflected off the walls of a room carry information about the geometry of the enclosure. Capitalization of this acoustic property could lead to improvements in current state-of-the-art methods for sound field estimation, where prior information can be used to improve the conditioning of the problem. In this thesis,...

Compressive Sensing for Near-field Source Localization

Near-field source localization is an important aspect in many diverse areas such as acoustics, seismology, to list a few. The planar wave assumption frequently used in far-field source localization is no longer valid when the sources are in the near field. Near-field sources can be localized by solving a joint direction-of-arrival and range...

Binaural CASA algorithm for speech source localization: Advancements in noisy and reverberant situations

In this thesis a binaural CASA localization algorithm is developed for the implementation in a binaural hearing aid with downstream speech enhancement. Two binaural CASA localization algorithms, based on the Albani model, are proposed to enhance the localization performance in noisy and reverberant acoustic environments. The Albani model is...