A5086946382- Hearing Loss and Rehabilitation
- Noise Effects and Management
- Speech and Audio Processing
- Multisensory perception and integration
- Advanced Adaptive Filtering Techniques
- Acoustic Wave Phenomena Research
- Tactile and Sensory Interactions
- Hearing Impairment and Communication
- Music Technology and Sound Studies
- Hearing, Cochlea, Tinnitus, Genetics
- Nuclear Physics and Applications
- Virtual Reality Applications and Impacts
- Particle Detector Development and Performance
- Power Line Communications and Noise
- Laser-Plasma Interactions and Diagnostics
- Neuroscience and Music Perception
- Linguistic research and analysis
- Music and Audio Processing
- Advanced Data Compression Techniques
- Multimedia Communication and Technology
- Radiation Detection and Scintillator Technologies
- Wireless Body Area Networks
- Human Motion and Animation
- Medical Practices and Rehabilitation
- Teleoperation and Haptic Systems
Hearing4all
2014-2024
Carl von Ossietzky Universität Oldenburg
2014-2024
Signal Processing (United States)
2021
Klinikum Oldenburg
2015-2020
Los Alamos National Laboratory
2011-2014
University of California, Davis
2001-2002
Washington University in St. Louis
1985
In the framework of European HearCom project, promising signal enhancement algorithms were developed and evaluated for future use in hearing instruments. To assess algorithms’ performance, five selected implemented on a common real-time hardware/software platform. Four test centers Belgium, The Netherlands, Germany, Switzerland perceptually algorithms. Listening tests performed with large numbers normal-hearing hearing-impaired subjects. Three perceptual measures used: speech reception...
Ecological validity is a relatively new concept in hearing science. It has been cited as relevant with increasing frequency publications over the past 20 years, but without any formal conceptual basis or clear motive. The sixth Eriksholm Workshop was convened to develop deeper understanding of for purpose applying it research consistent and productive manner. Inspired by debate within field psychology, taking into account World Health Organization's International Classification Functioning,...
A $200\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ radius hot spot at more than 2 keV temperature, $1\text{ }\mathrm{g}/{\mathrm{cm}}^{3}$ density has been achieved on the National Ignition Facility using a near vacuum hohlraum. The implosion exhibits ideal one-dimensional behavior and 99% laser-to-hohlraum coupling. low opacity of remaining shell bang time allows for measurement x-ray emission reflected central shock in deuterium plasma. Comparison with 1D hydrodynamic simulations puts...
Atoolbox for creation and rendering of dynamic virtual acoustic environments (TASCAR)that allows direct user interaction wasdeveloped application in hearing aid research audiology.This technical paper describes the general software structure time-domain simulation methods, i.e., transmission model, image source render formats, used to produce with moving objects.Implementationspecificproperties are described, computational performance system wasmeasured as afunction complexity.Results...
To assess perception with and performance of modern future hearing devices advanced adaptive signal processing capabilities, novel evaluation methods are required that go beyond already established methods. These will simulate to a certain extent the complexity variability acoustic conditions communication styles in real life. This article discusses current state perspectives virtual reality technology use lab for designing complex audiovisual environments assessment device design...
The audio visual benefit in speech perception, where congruent input enhances auditory processing, is well documented across age groups, particularly challenging listening conditions and among individuals with varying hearing abilities. However, most studies rely on highly controlled laboratory environments scripted stimuli. Here, we examine the using unscripted, natural from untrained speakers within a virtual acoustic environment. Using electroencephalography (EEG) cortical tracking,...
The audio-visual benefit in speech perception—where congruent visual input enhances auditory processing—is well-documented across age groups, particularly challenging listening conditions and among individuals with varying hearing abilities. However, most studies rely on highly controlled laboratory environments scripted stimuli. Here, we examine the using unscripted, natural from untrained speakers within a virtual acoustic environment. Using electroencephalography (EEG) cortical tracking,...
Recent achievements in hearing aid development, such as visually guided aids, make it increasingly important to study movement behavior everyday situations order develop test methods and evaluate performance. In this work, audiovisual virtual environments (VEs) were designed for communication conditions a living room, lecture hall, cafeteria, train station, street environment. Movement (head movement, gaze direction, torso rotation) electroencephalography signals measured these VEs the...
Although previous research indicates that cognitive skills influence benefit from different types of hearing aid algorithms, comparatively little is known about the role of, and potential interaction with, loss. This holds true especially for noise reduction (NR) processing. The purpose present study was thus to explore whether degree loss function modulate binaural NR settings based on measures speech intelligibility, listening effort, overall preference.Forty elderly listeners with...
Background: Field tests and guided walks in real environments show that the benefit from hearing aid (HA) signal processing real-life situations is typically lower than predicted found laboratory studies. This suggests test outcome measures are poor predictors of HA benefits. However, a systematic evaluation algorithms field difficult due to lack reproducibility control conditions. Virtual acoustic simulate may allow for reproducible HAs under more realistic conditions, thus providing better...
The effect of a binaural coherence-based noise reduction scheme on the feedback stability margin and sound quality in hearing aids has been analyzed. For comparison, conventional adaptive canceler (AFC) combination filter with coherence have tested. observed quantities are target signal attenuation. An objective measure stability, i.e., added stable gain (ASG) was obtained for number algorithmic settings compared to subjective tolerable (ATG). In an attempt eliminate bias estimating ATG,...
In a previous study, ) investigated whether pure-tone average (PTA) hearing loss and working memory capacity (WMC) modulate benefit from different binaural noise reduction (NR) settings. Results showed that listeners with smaller WMC preferred strong over moderate NR even at the expense of poorer speech recognition due to greater distortion (SD), whereas larger did not. To enable better understanding these findings, main aims present study were (1) explore perceptual consequences changes...
open Master Hearing Aid (openMHA) was developed and provided to the hearing aid research community as an open-source software platform with aim support sustainable reproducible towards improvement new types of assistive systems not limited by proprietary software. The offers a flexible framework that allows users conduct using tools number signal processing plugins well implementation own methods. openMHA is independent specific hardware supports Linux, macOS Windows operating 32-bit 64-bit...
Virtual reality with multichannel audio playback is increasingly used in hearing aid research. The purpose of this study to compare horizontal (2D) and periphonic (3D) rendering methods terms localization, minimum audible angle, perceptual ratings related spatial quality. Higher Order Ambisonics, Vector-Base Amplitude Panning, Nearest Speaker Selection were used, through 16, 29 45 speakers. results show that an improvement vertical localization can be obtained by using instead rendering....
While experimentation with synthetic stimuli in abstracted listening situations has a long standing and successful history hearing research, an increased interest exists on closing the remaining gap towards real-life by replicating high ecological validity lab. This is important for understanding underlying auditory mechanisms their relevance as well developing evaluating increasingly sophisticated algorithms assistance. A range of ‘classical’ paradigms have evolved to de-facto standards...
In contrast to static sounds, spatially dynamic sounds have received little attention in psychoacoustic research so far. This holds true especially for acoustically complex (reverberant, multisource) conditions and impaired hearing. The current study therefore investigated the influence of reverberation number concurrent sound sources on source movement detection young normal-hearing (YNH) elderly hearing-impaired (EHI) listeners. A listening environment based natural environmental was...
Loudspeaker-based spatial audio reproduction schemes are increasingly used for evaluating hearing aids in complex acoustic conditions.To further establish the feasibility of this approach, study investigated interaction between resolution different methods and technical perceptual aid performance measures using computer simulations.Three -discrete speakers, vector base amplitude panning higher order ambisonics -were compared regular circular loudspeaker arrays with 4 to 72 channels.The...
Virtual characters are an integral part of many games and virtual worlds. The ability to accurately synchronize lip movement audio speech is important aspect in the believability character. In this paper we propose a simple rule-based lip-syncing algorithm for agents using web browser. It works real-time with live input, unlike most current proposals, which may require considerable amounts computation, expertise time set up. Our method generates reliable animation based on three blend shapes...
Head movements can improve sound localization performance and speech intelligibility in acoustic environments with spatially distributed sources. However, they affect the of hearing aid algorithms, when adaptive algorithms have to adjust changes scene caused by head movement (the so-called maladaptation effect) or directional are not facing optimal direction because has moved away misalignment effect). In this article, we investigated mechanisms behind these effects for a set six standard...
Objective The aim was to create and validate an audiovisual version of the German matrix sentence test (MST), which uses existing audio-only speech material.Design Video recordings were recorded dubbed with audio MST. current study evaluates MST in conditions including visual modalities, quiet noise, open closed-set response formats.Sample One female talker repetitions sentences. Twenty-eight young normal-hearing participants completed evaluation study.Results benefit 7.0 dB sound pressure...
When listening to a sound source in everyday situations, typical movement behavior is highly individual and may not result the listener directly facing source. Behavioral differences can affect performance of directional algorithms hearing aids, as was shown previous work by using head trajectories normal-hearing (NH) listeners acoustic simulations for noise-suppression predictions. However, hearing-impaired (HI) with or without aids differ, hearing-aid users might adapt their self-motion...
Virtual reality (VR) scenes were developed for a new clinical approach to fine-tune hearing devices.This VR-based fine-tuning procedure allows care professionals try out various settings with hearing-device users in different scenes, so that individualized and optimized can be achieved dedicated situations.The focus of this contribution is on the development VR scenes.We explain how we selected what choices made when implementing scenes.Moreover, present results technical evaluation two...
A well-known issue in clinical audiology and hearing research is the level of abstraction traditional experimental assessments methods, which lack ecological validity differ significantly from real-life experiences, often resulting unreliable outcomes.Attempts to deal with this matter by, for example, performing experiments contexts, can be problematic due difficulty accurately identifying control-specific parameters events.Virtual augmented reality (VR/AR) have potential provide dynamic...