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Featured researches published by Thomas Lunner.


Hearing Research | 2018

Toward a more comprehensive understanding of the impact of masker type and signal-to-noise ratio on the pupillary response while performing a speech-in-noise test

Dorothea Wendt; Thomas Koelewijn; Patrycja Książek; Sophia E. Kramer; Thomas Lunner

ABSTRACT Difficulties arising in everyday speech communication often result from the acoustical environment, which may contain interfering background noise or competing speakers. Thus, listening and understanding speech in noise can be exhausting. Two experiments are presented in the current study that further explored the impact of masker type and Signal‐to‐Noise Ratio (SNR) on listening effort by means of pupillometry. In both studies, pupillary responses of participants were measured while performing the Danish Hearing in Noise Test (HINT; Nielsen and Dau, 2011). The first experiment aimed to replicate and extend earlier observed effects of noise type and semantic interference on listening effort (Koelewijn et al., 2012). The impact of three different masker types, i.e. a fluctuating noise, a 1‐talker masker and a 4‐talker masker on listening effort was examined at a fixed speech intelligibility. In a second experiment, effects of SNR on listening effort were examined while presenting the HINT sentences across a broad range of fixed SNRs corresponding to intelligibility scores ranging from 100% to 0% correct performance. A peak pupil dilation (PPD) was calculated and a Growth Curve Analysis (GCA) was performed to examine listening effort involved in speech recognition as a function of SNR. The results of two experiments showed that the pupil dilation response is highly affected by both masker type and SNR when performing the HINT. The PPD was highest, suggesting the highest level of effort, for speech recognition in the presence of the 1‐talker masker in comparison to the 4‐talker babble and the fluctuating noise masker. However, the disrupting effect of one competing talker disappeared for intelligibly levels around 50%. Furthermore, it was demonstrated that the pupillary response strongly varied as a function of SNRs. Listening effort was highest for intermediate SNRs with performance accuracies ranging between 30% and 70% correct. GCA revealed time‐dependent effects of the SNR on the pupillary response that were not reflected in the PPD. HighlightsTwo experiments explored the impact of masker type and Signal‐to‐Noise Ratio on listening effort by means of pupillometry using a speech‐in‐noise test.Listening effort is highly affected by the masker type and the semantic interference of the masker.Pupillary response changed non‐linearly across a range of fixed SNRs that corresponded to a wide range of recognition performance.The pupillary response demonstrated that listening effort is highest at intermediate SNRs corresponding to 30–70% speech intelligibility.Pupillary response was reduced at unfavourable SNRs corresponding to intelligibility between 0 ‐ 30% suggesting that listeners spent less resources probably due to disengagement and giving up in those adverse listening situations.


Archive | 2014

Hearing assistance device with brain computer interface

Niels Henrik Pontoppidan; Thomas Lunner; Michael Pedersen; Lars Ivar Hauschultz; Povl Koch; Graham Naylor; Eline Borch Petersen


Archive | 2014

Adjustable hearing aid device

Michael Pedersen; Michael Nilsson; Peter Sommer; Jan Petersen; Thomas Lunner; Anders Thule; Janik Buetikofer; Henning Knak Poulsen; Jacob Anders Roug; Henrik Bendsen; Signe Frølund Albeck; Jesko Lamm; Christian Müller; Regin Kopp Pedersen; Troels Rygaard; Carsten Borg; Thomas Kaulberg; Henrik Nielsen


Archive | 2015

Methods and apparatus for processing audio signals

Niels Henrik Pontoppidan; Thomas Lunner; Marianna Vatti


Archive | 2013

LISTENING DEVICE COMPRISING AN INTERFACE TO SIGNAL COMMUNICATION QUALITY AND/OR WEARER LOAD TO WEARER AND/OR SURROUNDINGS

Niels Henrik Pontoppidan; Renskje K. Hietkamp; Lisbeth Dons Jensen; Thomas Lunner; Karsten Bo Rasmussen


Archive | 2014

Listening device comprising an interface to signal communication quality and/or wearer load to surroundings

Niels Henrik Pontoppidan; Renskje K. Hietkamp; Lisbeth Dons Jensen; Thomas Lunner


Archive | 2018

HEARING AID WITH AN EXTENDED DOME

Thor Højlund Olsen; Troels Holm Pedersen; Claus Nielsen; Svend Oscar Petersen; Kenneth Rueskov Møller; Lars Steen Christensen; Thomas Lunner


ARO Midwinter meeting (abstract) | 2018

A closed-loop platform for real-time attention control of simultaneous sound streams

Daniel E. Wong; Jens Hjortkjær; Enea Ceolini; Søren Vørnle Nielsen; Sergi Rotger Griful; Søren A. Fuglsang; Maria Chait; Thomas Lunner; Torsten Dau; Shih-Chii Liu; Alain de Cheveigné


Proceedings of the International Symposium on Auditory and Audiological Research | 2017

Steering of audio input in hearing aids by eye gaze through electrooculography

Antoine Favre-Félix; Renskje K. Hietkamp; Carina Graversen; Torsten Dau; Thomas Lunner


Archive | 2016

Method, device and system for increasing a person's ability to suppress non-wanted auditory percepts

Eline Borch Petersen; Thomas Lunner; Niels Henrik Pontoppidan

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Dorothea Wendt

Technical University of Denmark

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Michael Pedersen

Copenhagen University Hospital

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Graham Naylor

University of Nottingham

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Torsten Dau

Technical University of Denmark

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Antoine Favre-Félix

Technical University of Denmark

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