Thomas Lunner
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View article: Conversational Dynamics in Task Dialogue Between Interlocutors With and Without Hearing Impairment
Conversational Dynamics in Task Dialogue Between Interlocutors With and Without Hearing Impairment Open
This study investigated the effects of noise and hearing impairment on conversational dynamics between pairs of young normal-hearing and older hearing-impaired interlocutors. Twelve pairs of normal-hearing and hearing-impaired individuals …
View article: Group Conversations in Noisy Environments (GiN) – Multimedia Recordings for Location-Aware Speech Enhancement
Group Conversations in Noisy Environments (GiN) – Multimedia Recordings for Location-Aware Speech Enhancement Open
Recent years have seen a growing interest in the use of smart glasses mounted with microphones to solve the cocktail party problem using beamforming techniques or machine learning. Many such approaches could bring substantial advances in h…
View article: Subspace Hybrid MVDR Beamforming for Augmented Hearing
Subspace Hybrid MVDR Beamforming for Augmented Hearing Open
Signal-dependent beamformers are advantageous over signal-independent beamformers when the acoustic scenario - be it real-world or simulated - is straightforward in terms of the number of sound sources, the ambient sound field and their dy…
View article: Copresence Was Found to Be Related to Some Pupil Measures in Persons With Hearing Loss While They Performed a Speech-in-Noise Task
Copresence Was Found to Be Related to Some Pupil Measures in Persons With Hearing Loss While They Performed a Speech-in-Noise Task Open
Objectives: To assess if a manipulation of copresence was related to speech-in-noise task performance, arousal, and effort of persons with hearing loss. Task-related arousal and effort were measured by means of pupillometry. Design: Twenty…
View article: Subspace Hybrid Beamforming for Head-worn Microphone Arrays
Subspace Hybrid Beamforming for Head-worn Microphone Arrays Open
A two-stage multi-channel speech enhancement method is proposed which consists of a novel adaptive beamformer, Hybrid Minimum Variance Distortionless Response (MVDR), Isotropic-MVDR (Iso), and a novel multi-channel spectral Principal Compo…
View article: Alpha Oscillations During Effortful Continuous Speech: From Scalp EEG to Ear-EEG
Alpha Oscillations During Effortful Continuous Speech: From Scalp EEG to Ear-EEG Open
EEG alpha power in continuous speech may indicate of how well the speech was perceived and it can be measured with both scalp and Ear-EEG.
View article: Comment on the Point of View “Ecological Validity, External Validity and Mundane Realism in Hearing Science”
Comment on the Point of View “Ecological Validity, External Validity and Mundane Realism in Hearing Science” Open
To the Editor: Ear and Hearing recently published a point of view paper on "Ecological validity, external validity and mundane realism in hearing science" (Beechey 2022) that references the 2020 Eriksholm workshop consensus paper on "The q…
View article: The Spear Challenge - Review of Results
The Spear Challenge - Review of Results Open
Verbal communication can be challenging in the presence of acoustic noise.To tackle this problem, microphone arrays coupled with numerous processing methods have been studied in the past few decades.Recent interest in Augmented Reality (AR…
View article: Hearing Aid Noise Reduction Lowers the Sustained Listening Effort During Continuous Speech in Noise—A Combined Pupillometry and EEG Study
Hearing Aid Noise Reduction Lowers the Sustained Listening Effort During Continuous Speech in Noise—A Combined Pupillometry and EEG Study Open
Objectives: The investigation of auditory cognitive processes recently moved from strictly controlled, trial-based paradigms toward the presentation of continuous speech. This also allows the investigation of listening effort on larger tim…
View article: The Presence of Another Individual Influences Listening Effort, But Not Performance
The Presence of Another Individual Influences Listening Effort, But Not Performance Open
Objectives: The aim of this study was to modify a speech perception in noise test to assess whether the presence of another individual (copresence), relative to being alone, affected listening performance and effort expenditure. Furthermor…
View article: Effect of Speech-to-Noise Ratio and Luminance on a Range of Current and Potential Pupil Response Measures to Assess Listening Effort
Effect of Speech-to-Noise Ratio and Luminance on a Range of Current and Potential Pupil Response Measures to Assess Listening Effort Open
In hearing research, pupillometry is an established method of studying listening effort. The focus of this study was to evaluate several pupil measures extracted from the Task-Evoked Pupil Responses (TEPRs) in speech-in-noise test. A range…
View article: Investigating the Influences of Task Demand and Reward on Cardiac Pre-Ejection Period Reactivity During a Speech-in-Noise Task
Investigating the Influences of Task Demand and Reward on Cardiac Pre-Ejection Period Reactivity During a Speech-in-Noise Task Open
Objectives: Effort investment during listening varies as a function of task demand and motivation. Several studies have manipulated both these factors to elicit and measure changes in effort associated with listening. The cardiac pre-eject…
View article: Potential of Augmented Reality Platforms to Improve Individual Hearing Aids and to Support More Ecologically Valid Research
Potential of Augmented Reality Platforms to Improve Individual Hearing Aids and to Support More Ecologically Valid Research Open
An augmented reality (AR) platform combines several technologies in a system that can render individual “digital objects” that can be manipulated for a given purpose. In the audio domain, these may, for example, be generated by speaker sep…
View article: Three New Outcome Measures That Tap Into Cognitive Processes Required for Real-Life Communication
Three New Outcome Measures That Tap Into Cognitive Processes Required for Real-Life Communication Open
To increase the ecological validity of outcomes from laboratory evaluations of hearing and hearing devices, it is desirable to introduce more realistic outcome measures in the laboratory. This article presents and discusses three outcome m…
View article: The Quest for Ecological Validity in Hearing Science: What It Is, Why It Matters, and How to Advance It
The Quest for Ecological Validity in Hearing Science: What It Is, Why It Matters, and How to Advance It Open
Ecological validity is a relatively new concept in hearing science. It has been cited as relevant with increasing frequency in publications over the past 20 years, but without any formal conceptual basis or clear motive. The sixth Erikshol…
View article: Neural Representation Enhanced for Speech and Reduced for Background Noise With a Hearing Aid Noise Reduction Scheme During a Selective Attention Task
Neural Representation Enhanced for Speech and Reduced for Background Noise With a Hearing Aid Noise Reduction Scheme During a Selective Attention Task Open
Altogether our results support the hypothesis that the NR schemes in HAs serve to enhance the neural representation of speech and reduce the neural representation of background noise during a selective attention task. We contend that these…
View article: An exploratory Study of EEG Alpha Oscillation and Pupil Dilation in Hearing-Aid Users During Effortful listening to Continuous Speech
An exploratory Study of EEG Alpha Oscillation and Pupil Dilation in Hearing-Aid Users During Effortful listening to Continuous Speech Open
Individuals with hearing loss allocate cognitive resources to comprehend noisy speech in everyday life scenarios. Such a scenario could be when they are exposed to ongoing speech and need to sustain their attention for a rather long period…
View article: Absolute Eye Gaze Estimation With Biosensors in Hearing Aids
Absolute Eye Gaze Estimation With Biosensors in Hearing Aids Open
People with hearing impairment typically have difficulties following conversations in multi-talker situations. Previous studies have shown that utilizing eye gaze to steer audio through beamformers could be a solution for those situations.…
View article: Visual Rhyme Judgment in Adults With Mild-to-Severe Hearing Loss
Visual Rhyme Judgment in Adults With Mild-to-Severe Hearing Loss Open
Adults with poorer peripheral hearing have slower phonological processing speed measured using visual rhyme tasks, and it has been suggested that this is due to fading of phonological representations stored in long-term memory. Representat…
View article: A Tutorial on Auditory Attention Identification Methods
A Tutorial on Auditory Attention Identification Methods Open
Auditory attention identification methods attempt to identify the sound source of a listener's interest by analyzing measurements of electrophysiological data. We present a tutorial on the numerous techniques that have been developed in re…
View article: Benefit of Higher Maximum Force Output on Listening Effort in Bone-Anchored Hearing System Users: A Pupillometry Study
Benefit of Higher Maximum Force Output on Listening Effort in Bone-Anchored Hearing System Users: A Pupillometry Study Open
Objectives: The aim of this study was to compare listening effort, as estimated via pupillary response, during a speech-in-noise test in bone-anchored hearing system (BAHS) users wearing three different sound processors. The three processo…
View article: On the Interaction of Head and Gaze Control With Acoustic Beam Width of a Simulated Beamformer in a Two-Talker Scenario
On the Interaction of Head and Gaze Control With Acoustic Beam Width of a Simulated Beamformer in a Two-Talker Scenario Open
Superdirectional acoustic beamforming technology provides a high signal-to-noise ratio, but potential speech intelligibility benefits to hearing aid users are limited by the way the users move their heads. Steering the beamformer using eye…
Pupil light reflex evoked by light-emitting diode and computer screen: Methodology and association with need for recovery in daily life Open
This study assessed the PLR generated by a computer screen and the PLR generated by a LED. The good reliability within set-ups and the consistency between the PLRs evoked by the set-ups indicate that both systems provides a valid way to ev…
View article: Experiences of an Internet-based aural rehabilitation (IAR) program for hearing aid users: a qualitative study
Experiences of an Internet-based aural rehabilitation (IAR) program for hearing aid users: a qualitative study Open
Objective: Internet interventions for hearing aid (HA) users have been shown to be effective in helping persons with hearing problems. As earlier research refers to objective data on these effects, little is known about how participants ex…