Test fixture fidelity to human measurements remains an open question

Evidence

Headphones with headbands require a test fixture that can support them while under test. How well the headphone fits and is coupled to the artificial head and ear affect its acoustical performance. The better the dimensions, shape and materials of the head, cheek, pinna and ear canal match those of an average human, the better the headphone’s sound will correlate to what is measured and heard on humans. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1710

Categorization

• DEFINE: Establishes the core principle of artificial-head test fixtures: coupling fidelity drives correlation between measured and heard sound.
• corroborated: 2 independent passages support this claim — Toole, Floyd E, Sound reproduction- the acoustics and…, 1710
• XREF: connects to: Testing real human panels for anatomical representativeness is impractical, driving manikin approaches; Headphone test-fixture measurements often fail to predict what individual listeners hear; Anthropometric head quintiles can validate headphone reproducibility at design time (+1 more)

Broader Connections

• Headphone test-fixture measurements often fail to predict what individual listeners hear #expands (0.95)
• Anthropometric head quintiles can validate headphone reproducibility at design time #corroborates (0.85)
• Ear-drum reference point measurements are clinically risky and unreliable at high frequencies #expands (0.80)