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Interaction Between Head Movement Behavior and Simulated Spatial Filtering: Comparing Free Conversation and Speech

Giso Grimm1, Angelika Kothe1, Volker Hohmann1

  • 1Auditory Signal Processing and Cluster of Excellence "Hearing4all", Department of Medical Physics and Acoustics, Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany.

Trends in Hearing
|July 9, 2026
PubMed
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Effect of Avatar Head Movements on Communication Behavior and Subjective Evaluations of Presence and Success in Triadic Conversations.

Trends in hearing·2026
See all related articles

Virtual reality (VR) allows for realistic hearing device testing. Free conversations in VR provide more accurate signal-to-noise ratio (SNR) measurements than traditional speech tests, improving hearing aid research validity.

Area of Science:

  • Audiology
  • Virtual Reality
  • Acoustics

Background:

  • Hearing device benefits differ between lab and real-world settings.
  • Low signal-to-noise ratio (SNR) in speech tests and head movement variations impact lab evaluations.
  • Traditional hearing aid research may lack ecological validity.

Purpose of the Study:

  • To measure SNR improvement from a spatial filter during free conversation in VR.
  • To compare VR free conversation SNR improvement with a VR speech test.
  • To assess the ecological validity of VR for hearing aid research.

Main Methods:

  • 11 normal-hearing participants experienced two VR conditions: free conversation and a two-talker speech test.
  • A spatial filter's benefit was simulated using dynamic head orientation.
Keywords:
free conversation paradigmhearing-aid benefitmultimodal hearing aid evaluationspeech reception threshold (SRT)virtual reality

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  • Acoustic simulations rendered speech, noise, and room acoustics.

    • Main Results:

    • Spatial filter benefit was higher in free conversation than in the speech test.
    • Participants exhibited more head movement towards active speakers during free conversation.
    • VR free conversation SNRs more closely resembled real-world conversational environments.

    Conclusions:

    • VR free conversation offers a more ecologically valid method for evaluating hearing device effectiveness.
    • This VR approach can yield more realistic SNR measurements.
    • Findings suggest improved hearing aid research outcomes through VR-based conversational testing.