Audibility thresholds for HRTF-switching in binaural synthesis

  • Hoffmann, Pablo F., (Project Participant)
  • Møller, Henrik, (Project Participant)

Project Details

Description

The project is part of a general project that investigates aspects of binaural synthesis related to changes in the sound field that occur as a result of moving sound. In order to synthesize these changes, head-related transfer functions (HRTFs) must be updated as a function of time. In this sense, implications of using direct switching of HRTFs are studied. Due to the discrete nature of the spatial representation available from the HRTFs, the switching operation generates artifacts that can be audible, e.g. clicks, and this may affect the perceived quality of the sound. These artifacts should ideally be below the threshold of human perception, here denoted the minimum audible switch, MAS. This project studies MAS in terms of the temporal and spectral characteristics of the HRTFs separately. Psychophysical experiments were conducted in order to measure audibility thresholds for temporal and spectral switching of HRTFs. These thresholds have been defined as the minimum audible time switch (MATS), and the minimum audible spectral switch (MASS). The more general result is that temporal characteristics require a higher resolution than spectral characteristics. Related projects are "Dynamic issues in binaural technology" and "Audibility of differences between adjacent HRTFs". Supported by STVF/FTP.
StatusFinished
Effective start/end date31/12/200831/12/2008

Projects

Dynamic issues in binaural technology

Hoffmann, P. F. & Møller, H.

31/12/200831/12/2008

Project: Research

Audibility of differences between adjacent HRTFs

Hoffmann, P. F. & Møller, H.

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31/12/200831/12/2008

Project: Research

  • Research Output

    • 2 Article in proceeding
    • 1 Ph.D. thesis
    • 1 Journal article

    Audibility of direct switching between head-related transfer functions

    Hoffmann, P. F. & Møller, H., 2008, In : Acustica United with Acta Acustica. 94, 6, p. 955-964

    Research output: Contribution to journalJournal article

    File
    3 Citations (Scopus)
    155 Downloads (Pure)

    Characteristics of head-related transfer functions: discrimination and switching between adjacent directions

    Hoffmann, P. F., 2008, Aalborg: Aalborg Universitet. 69 p.

    Research output: Book/ReportPh.D. thesisResearch

    Open Access
    File

    Audibility of spectral switching in head-related transfer functions

    Hoffmann, P. F. & Møller, H., 2005, Proceedings of 119th AES Convention. 9 p.

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

    File