Richard C. Hendriks
YOU?
Author Swipe
View article: Evaluation of an ITD-to-ILD Transformation as a Method to Restore the Spatial Benefit in Speech Intelligibility in Hearing Impaired Listeners
Evaluation of an ITD-to-ILD Transformation as a Method to Restore the Spatial Benefit in Speech Intelligibility in Hearing Impaired Listeners Open
To improve speech intelligibility in complex everyday situations, the human auditory system partially relies on Interaural Time Differences (ITDs) and Interaural Level Differences (ILDs). However, hearing impaired (HI) listeners often exhi…
View article: MVDR Beamforming for Cyclostationary Processes
MVDR Beamforming for Cyclostationary Processes Open
Conventional acoustic beamformers assume that noise is stationary within short time frames. This assumption prevents them from exploiting correlations between frequencies in almost-periodic noise sources such as musical instruments, fans, …
View article: Optimal pilot design for OTFS in linear time-varying channels
Optimal pilot design for OTFS in linear time-varying channels Open
View article: Cyclic Multichannel Wiener Filter for Acoustic Beamforming
Cyclic Multichannel Wiener Filter for Acoustic Beamforming Open
Acoustic beamforming models typically assume wide-sense stationarity of speech signals within short time frames. However, voiced speech is better modeled as a cyclostationary (CS) process, a random process whose mean and autocorrelation ar…
View article: In search of a driver for atrial fibrillation
In search of a driver for atrial fibrillation Open
During extensive mapping, the fastest or most regularly activated areas are characterized by CB and smoothly propagating fibrillation waves instead of repetitive occurrence of focal or rotational activation patterns. This study rejects the…
View article: Harmonics to the Rescue: Why Voiced Speech is Not a WSS Process
Harmonics to the Rescue: Why Voiced Speech is Not a WSS Process Open
Speech processing algorithms often rely on statistical knowledge of the underlying process. Despite many years of research, however, the debate on the most appropriate statistical model for speech still continues. Speech is commonly modele…
View article: Wideband Relative Transfer Function (RTF) Estimation Exploiting Frequency Correlations
Wideband Relative Transfer Function (RTF) Estimation Exploiting Frequency Correlations Open
This article focuses on estimating relative transfer functions (RTFs) for beamforming applications. Traditional methods often assume that spectra are uncorrelated, an assumption that is often violated in practical scenarios due to factors …
View article: Optimal Pilot Design for OTFS in Linear Time-Varying Channels
Optimal Pilot Design for OTFS in Linear Time-Varying Channels Open
This paper investigates the positioning of the pilot symbols, as well as the power distribution between the pilot and the communication symbols in the orthogonal time frequency space (OTFS) modulation scheme. We analyze the pilot placement…
View article: Doppler-tolerant underwater communications
Doppler-tolerant underwater communications Open
Underwater communication is vital for applications like environmental monitoring, marine exploration, and underwater robotics. Real-time communication from autonomous underwater vehicles (AUVs) or bottom nodes to a gateway buoy faces limit…
View article: Optimal Pilot Design for Otfs in Linear Time-Varying Channels
Optimal Pilot Design for Otfs in Linear Time-Varying Channels Open
View article: Binaural Beamforming Taking Into Account Spatial Release From Masking
Binaural Beamforming Taking Into Account Spatial Release From Masking Open
Hearing impairment is a prevalent problem that comes with many daily life challenges. These challenges, mainly in the areas of speech intelligibility and sound localisation, can have consequences ranging from social isolation to physical d…
View article: On the equivalence of OSDM and OTFS
On the equivalence of OSDM and OTFS Open
View article: A Singular-value-based Marker for the Detection of Atrial Fibrillation Using High-resolution Electrograms and Multi-lead ECG
A Singular-value-based Marker for the Detection of Atrial Fibrillation Using High-resolution Electrograms and Multi-lead ECG Open
The severity of atrial fibrillation (AF) can be assessed from intra-operative epicardial measurements (high-resolution electrograms), using metrics such as conduction block (CB) and continuous conduction delay and block (cCDCB). These feat…
View article: Estimation of Cardiac Fibre Direction Based on Activation Maps
Estimation of Cardiac Fibre Direction Based on Activation Maps Open
Estimating tissue conductivity parameters from electrograms (EGMs) could be an important tool for diagnosing and treating heart rhythm disorders such as atrial fibrillation (AF). One of these parameters is the fibre direction, often assume…
View article: Noise PSD Insensitive RTF Estimation in a Reverberant and Noisy Environment
Noise PSD Insensitive RTF Estimation in a Reverberant and Noisy Environment Open
Spatial filtering techniques typically rely on estimates of the target relative transfer function (RTF). However, the target speech signal is typically corrupted by late reverberation and ambient noise, which complicates RTF estimation. Ex…
View article: High Dominant Frequencies and Fractionated Potentials Do Not Indicate Focal or Rotational Activation During AF
High Dominant Frequencies and Fractionated Potentials Do Not Indicate Focal or Rotational Activation During AF Open
View article: Exploring the use of Granger causality for the identification of chemical exposure based on physiological data
Exploring the use of Granger causality for the identification of chemical exposure based on physiological data Open
Wearable sensors offer new opportunities for the early detection and identification of toxic chemicals in situations where medical evaluation is not immediately possible. We previously found that continuously recorded physiology in guinea …
View article: Alternating Least-Squares-Based Microphone Array Parameter Estimation for a Single-Source Reverberant and Noisy Acoustic Scenario
Alternating Least-Squares-Based Microphone Array Parameter Estimation for a Single-Source Reverberant and Noisy Acoustic Scenario Open
Acoustic-scene-related parameters such as relative transfer functions (RTFs) and power spectral densities (PSDs) of the target source, late reverberation and ambient noise are essential for microphone array signal processing and are challe…
View article: On the Equivalence of Osdm and Otfs
On the Equivalence of Osdm and Otfs Open
View article: Joint Maximum Likelihood Estimation of Microphone Array Parameters for a Reverberant Single Source Scenario
Joint Maximum Likelihood Estimation of Microphone Array Parameters for a Reverberant Single Source Scenario Open
Estimation of the acoustic-scene related parameters such as relative transfer functions (RTFs) from source to microphones, source power spectral densities (PSDs) and PSDs of the late reverberation is essential and also challenging. Existin…
View article: Novel Rank-based Features of Atrial Potentials for the Classification Between Paroxysmal and Persistent Atrial Fibrillation
Novel Rank-based Features of Atrial Potentials for the Classification Between Paroxysmal and Persistent Atrial Fibrillation Open
Atrial fibrillation (AF) is the most common arrhythmia.Although the exact cause is unclear, electropathology of atrial tissue is one contributing factor.Electropathological characteristics derived from intra-operative epicardial measuremen…
View article: Towards Gridless Sound Field Reconstruction
Towards Gridless Sound Field Reconstruction Open
The sound field in a room can be represented by a weighted sum of room modes. To estimate the room modes, current literature uses on-the-grid, sparse reconstruction methods. However, these on-the-grid methods are known to suffer from basis…
View article: On the Integration of Acoustics and LiDAR: a Multi-Modal Approach to Acoustic Reflector Estimation
On the Integration of Acoustics and LiDAR: a Multi-Modal Approach to Acoustic Reflector Estimation Open
Having knowledge on the room acoustic properties, e.g., the location of acoustic reflectors, allows to better reproduce the sound field as intended. Current state-of-the-art methods for room boundary detection using microphone measurements…
View article: Joint cardiac tissue conductivity and activation time estimation using confirmatory factor analysis
Joint cardiac tissue conductivity and activation time estimation using confirmatory factor analysis Open
Mathematical models of the electrophysiology of cardiac tissue play an important role when studying heart rhythm disorders like atrial fibrillation. Model parameters such as conductivity, activation time, and anisotropy ratio are useful pa…
View article: An accurate and efficient method to train classifiers for atrial fibrillation detection in ECGs: Learning by asking better questions
An accurate and efficient method to train classifiers for atrial fibrillation detection in ECGs: Learning by asking better questions Open
View article: Classification of De novo post-operative and persistent atrial fibrillation using multi-channel ECG recordings
Classification of De novo post-operative and persistent atrial fibrillation using multi-channel ECG recordings Open
View article: Cardiac tissue conductivity estimation using confirmatory factor analysis
Cardiac tissue conductivity estimation using confirmatory factor analysis Open
View article: Analyzing the effect of electrode size on electrogram and activation map properties
Analyzing the effect of electrode size on electrogram and activation map properties Open
View article: Digital biomarkers and algorithms for detection of atrial fibrillation using surface electrocardiograms: A systematic review
Digital biomarkers and algorithms for detection of atrial fibrillation using surface electrocardiograms: A systematic review Open
More and more studies focus on improving accuracy of classification methods for AF in ECGs. As a result, algorithms become increasingly complex and less well interpretable. Only a few studies focus on detecting atrial activity in the ECG. …
View article: Localization Based on Enhanced Low Frequency Interaural Level Difference
Localization Based on Enhanced Low Frequency Interaural Level Difference Open
The processing of low-frequency interaural time differences is found to be problematic among hearing-impaired people. The current generation of beamformers does not consider this deficiency. In an attempt to tackle this issue, we propose t…