Realistic Audiovisual Listening Environments in the Lab: Analysis of Movement Behavior and Consequences for Hearing Aids
* Presenting author
With increased complexity of hearing device algorithms a strong interaction between motion behavior of the user and hearing device benefit is likely to be found. To be able to assess this interaction experimentally more realistic evaluation methods are required that mark a transition from conventional lab experiments to the field.In this presentation we describe audiovisual listening environments that were designed to measure realistic movement behavior in relevant everyday-life situations in the lab. Results of a study that measured movement behavior of young and elderly normal-hearing listeners in these environments are presented. A retest and questionnaires showed that the data and calculated measures were reproducible and reliable, and that the environments were of a sufficient level of realism. Furthermore, results of the movement analysis show that movement behavior depends on the environment and age of the subject, and is predictable in multi-talker conversations and for moving distractors. Based on these results, predictions about the performance of hearing aids in everyday-life situations were made. A second study tested these predictions by estimating the hearing aid benefit related to noise suppression in the presented environments using acoustic simulations with the measured head movement behavior. Results of this second study are also presented.