{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T22:52:19Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude" }, "metaModel": { "id": "THING-Q601510", "registryId": "vr.tr.noise-barrier", "name": "noise barrier", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.BLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q601510/", "model": { "registry_id": "vr.tr.noise-barrier", "name": "noise barrier", "purpose": "Let an agent explain how noise barriers work and are designed, identify kinds and materials, relay standards and regulation, and distinguish barriers from other noise control measures.", "definition": "A structure built beside a road, railway or industrial site to reduce noise reaching nearby homes and areas by blocking, absorbing or deflecting sound, made of concrete, timber, metal, transparent panels, earth berms or vegetation-covered systems; noise barriers are designed by acoustic modelling to standards for insertion loss, are required by environmental noise regulation in many countries, and are assessed for cost, visual impact and durability.", "what_it_is_for": "Reducing environmental noise from transport and industry.", "affordances": [ "explain acoustic principles", "identify kinds and materials", "relay standards and regulation", "compare with other noise measures" ], "distinguishing_features": [ "Acoustic design", "Height and length determine effect", "Materials and finishes", "Regulatory driver" ], "appearance": "A wall or berm running alongside a road or railway, of panels or earth, sometimes transparent or planted.", "visual_identification": [ "Wall or berm beside a noise source", "Reflective, absorptive or earth forms", "Fences and retaining walls are not designed for acoustics; quiet pavements and insulation are other measures" ], "physical_properties": [ { "quantity": "typical insertion loss", "typical_range": "about 5-15", "unit": "dB", "note": "depending on height and geometry" } ], "families_and_kinds": [ "reflective barriers", "absorptive barriers", "earth berms and bunds", "transparent barriers", "vegetated and green barriers", "railway and industrial barriers", "barriers with photovoltaic panels" ], "related_models": [ { "relation": "is a kind of", "target": "noise control structure", "why": "in registry terms" }, { "relation": "is a kind of", "target": "built structure", "why": "in registry terms" }, { "relation": "reduces", "target": "environmental noise", "why": "from transport" }, { "relation": "is designed by", "target": "acoustic engineering", "why": "the discipline" } ], "identifiers": [], "standards_and_regulation": [ "Environmental noise directives and national noise limits", "European standards for road traffic noise reducing devices", "Highway design standards", "Structural and wind load codes" ], "failure_modes_and_hazards": [ "Insufficient height or gaps reducing effect", "Reflection increasing noise elsewhere", "Structural or maintenance failure", "Visual and community impact" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "How barriers work.", "rationale": "Science.", "layers": [ { "id": "principle", "name": "Principle", "description": "Acoustic principle.", "findings": [ { "id": "principle-finding", "name": "Principle", "description": "Principle.", "questions": [ { "text": "How does a noise barrier reduce sound, and what limits its effect?", "kind": "definition" }, { "text": "Is the structure a noise barrier or another wall or fence?", "kind": "boundary" } ] } ] }, { "id": "kinds", "name": "Kinds", "description": "Kinds and materials.", "findings": [ { "id": "kinds-finding", "name": "Kinds", "description": "Kinds.", "questions": [ { "text": "What kinds of barrier exist, and how do materials affect performance?", "kind": "definition" }, { "text": "Which entry fits the specific kind?", "kind": "action" } ] } ] } ] }, { "id": "design", "name": "Design", "description": "Design and standards.", "rationale": "Engineering.", "layers": [ { "id": "design", "name": "Design", "description": "Design.", "findings": [ { "id": "design-finding", "name": "Design", "description": "Design.", "questions": [ { "text": "How are barriers designed with acoustic modelling, and what standards apply?", "kind": "provenance" }, { "text": "Is the question site-specific, which needs an acoustic engineer?", "kind": "boundary" } ] } ] }, { "id": "regulation", "name": "Regulation", "description": "Regulation.", "findings": [ { "id": "regulation-finding", "name": "Regulation", "description": "Regulation.", "questions": [ { "text": "When do noise regulations require barriers, and who pays?", "kind": "provenance" }, { "text": "Which entry fits environmental noise regulation?", "kind": "action" } ] } ] } ] }, { "id": "compare", "name": "Compare", "description": "Alternatives and effects.", "rationale": "Practice.", "layers": [ { "id": "alternatives", "name": "Alternatives", "description": "Other measures.", "findings": [ { "id": "alternatives-finding", "name": "Alternatives", "description": "Alternatives.", "questions": [ { "text": "How do barriers compare with quiet pavements, speed limits and insulation?", "kind": "provenance" }, { "text": "Which entry fits noise control?", "kind": "action" } ] } ] }, { "id": "impacts", "name": "Impacts", "description": "Impacts.", "findings": [ { "id": "impacts-finding", "name": "Impacts", "description": "Impacts.", "questions": [ { "text": "What are the visual, ecological and community effects of barriers, with findings attributed?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and innovation.", "rationale": "Context.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did noise barriers develop with motorway construction?", "kind": "provenance" }, { "text": "Which entry fits the history of road engineering?", "kind": "action" } ] } ] }, { "id": "innovation", "name": "Innovation", "description": "Innovation.", "findings": [ { "id": "innovation-finding", "name": "Innovation", "description": "Innovation.", "questions": [ { "text": "What innovations exist, such as photovoltaic and green barriers?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should earth berms be a separate entry?", "How should standards be linked by country?", "How should performance data be recorded?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }