# Beyond the head-rotation study already catalogued (ips012), what do open-access sources report about head movement and head tracking for externalization and front-back confusion with generic or individual HRTFs, and what do they say about tracking latency?

- id: art_01M5MV9SN3RHHJ273HE2KBMY94
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T13, T19 · tags: none
- updated: 2026-10-23T17:00:25.628Z
- url: https://veyrul.com/articles/art_01M5MV9SN3RHHJ273HE2KBMY94

Catalogue ips012 already holds the head-rotation primary results (Brimijoin 2013; McAnally & Martin 2014) and the 22 to 33 ms update latency of that implementation. Added here: Hendrickx et al. 2017 (abstract only) report that head tracking with non-individualized HRTFs substantially improved externalization, especially for frontal and rear sources, and that it persisted after movement stopped; a 2020 review adds that self-initiated movement helps more than source movement and that benefit is larger for central sources; and Jenny & Reuter 2020 report self-reported front-back confusions of 27% with a generic HRTF versus 0% with the listener's own in head-tracked VR with free head movement. The sources read assert that latency matters but report no measured latency threshold.

Catalogue ips012 already holds the head-rotation primary results (Brimijoin 2013; McAnally & Martin 2014) and the 22 to 33 ms update latency of that implementation. Added here: Hendrickx et al. 2017 (abstract only) report that head tracking with non-individualized HRTFs substantially improved externalization, especially for frontal and rear sources, and that it persisted after movement stopped; a 2020 review adds that self-initiated movement helps more than source movement and that benefit is larger for central sources; and Jenny & Reuter 2020 report self-reported front-back confusions of 27% with a generic HRTF versus 0% with the listener's own in head-tracked VR with free head movement. The sources read assert that latency matters but report no measured latency threshold.

Curator qualifications: Adds Hendrickx 2017 (abstract only: head tracking with non-individual HRTFs improved externalization, esp. frontal) to catalogue ips012; ips012 primaries re-read by curator in UOD-CA-AM04-0003.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://api.archives-ouvertes.fr/search/?q=halId_s:hal-01525838",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC7488874/fullTextXML",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9073123/fullTextXML",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC7509635/fullTextXML",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC4130110/fullTextXML",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC3846779/fullTextXML",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Catalogue ips012 already holds the head-rotation primary results (Brimijoin 2013; McAnally & Martin 2014) and the 22 to 33 ms update latency of that implementation. Added here: Hendrickx et al. 2017 (abstract only) report that head tracking with non-individualized HRTFs substantially improved externalization, especially for frontal and rear sources, and that it persisted after movement stopped; a 2020 review adds that self-initiated movement helps more than source movement and that benefit is larger for central sources; and Jenny & Reuter 2020 report self-reported front-back confusions of 27% with a generic HRTF versus 0% with the listener's own in head-tracked VR with free head movement. The sources read assert that latency matters but report no measured latency threshold. · locator: candidate evidence excerpts · source: https://api.archives-ouvertes.fr/search/?q=halId_s:hal-01525838

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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