materials library / classes / stone and earth
NEURODESIGN® · MATERIAL CLASS · STONE AND EARTH
Gypsum plaster and board
The default wall substrate. Acoustically reflective at the surface, and a significant absorber only at low frequency through panel resonance.
Decisive attributes
The attributes that most determine how this class behaves and how it is experienced. No values are shown, because a value belongs to a product and not to a class. Two products of the same material can differ from each other by more than the material differs from its neighbours.
Typical application
Walls. Ceilings.
Evidence
No record in the research corpus tests human response to this material class. Its physical behaviour may be well understood and its properties may be entirely predictable from the attributes above. That is a different thing from evidence that a person responds to it, and this library does not convert one into the other. The absence is shown rather than filled.
Outcomes it could bear on
Outcomes whose material levers overlap this class. This is a structural relationship in the ontology, not a finding: it says the property is relevant to the outcome, not that this material produces it.
- Acoustic privacyvia Absorption coefficient by octave band, Mass per unit area
- Sleep onset and continuityvia Absorption coefficient by octave band, Light reflectance value
- Circadian light deliveryvia Light reflectance value
- Glare and visual comfortvia Light reflectance value
- Perceived spaciousnessvia Light reflectance value
- Recovery in care settingsvia Absorption coefficient by octave band
- Speech intelligibilityvia Absorption coefficient by octave band