UN Regulation No. 51 on noise emissions
E461644
UN Regulation No. 51 on noise emissions is an international vehicle standard that sets limits and test procedures for the external noise produced by motor vehicles to reduce environmental noise pollution.
All labels observed (1)
| Label | Occurrences |
|---|---|
| UN Regulation No. 51 on noise emissions canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4695301 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: UN Regulation No. 51 on noise emissions Context triple: [United Nations Regulations under the 1958 Agreement, contains, UN Regulation No. 51 on noise emissions]
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A.
Regulation 14 on sulfur oxides and particulate matter
Regulation 14 on sulfur oxides and particulate matter is a key provision in international maritime environmental law that sets limits on sulfur content in marine fuels and controls emissions of sulfur oxides and particulates from ships to reduce air pollution.
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B.
Regulation (EC) No 851/2004
Regulation (EC) No 851/2004 is the EU law that established the European Centre for Disease Prevention and Control and defined its mandate, structure, and functions in coordinating infectious disease surveillance and control across member states.
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C.
Regulation 51
Regulation 51 was a key provision of the United Kingdom’s wartime Defence Regulations that granted broad powers to the government to control or requisition property and resources for national security purposes.
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D.
Regulation (EU) No 1151/2012
Regulation (EU) No 1151/2012 is a European Union law that establishes the quality schemes and protection framework for agricultural products and foodstuffs, including designations such as Protected Designation of Origin and Protected Geographical Indication.
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E.
Title II – Emission Standards for Moving Sources
Title II – Emission Standards for Moving Sources is the portion of the U.S. Clean Air Act that regulates air pollution emissions from mobile sources such as cars, trucks, buses, and other vehicles and engines.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: UN Regulation No. 51 on noise emissions Target entity description: UN Regulation No. 51 on noise emissions is an international vehicle standard that sets limits and test procedures for the external noise produced by motor vehicles to reduce environmental noise pollution.
-
A.
Regulation 14 on sulfur oxides and particulate matter
Regulation 14 on sulfur oxides and particulate matter is a key provision in international maritime environmental law that sets limits on sulfur content in marine fuels and controls emissions of sulfur oxides and particulates from ships to reduce air pollution.
-
B.
Regulation (EC) No 851/2004
Regulation (EC) No 851/2004 is the EU law that established the European Centre for Disease Prevention and Control and defined its mandate, structure, and functions in coordinating infectious disease surveillance and control across member states.
-
C.
Regulation 51
Regulation 51 was a key provision of the United Kingdom’s wartime Defence Regulations that granted broad powers to the government to control or requisition property and resources for national security purposes.
-
D.
Regulation (EU) No 1151/2012
Regulation (EU) No 1151/2012 is a European Union law that establishes the quality schemes and protection framework for agricultural products and foodstuffs, including designations such as Protected Designation of Origin and Protected Geographical Indication.
-
E.
Title II – Emission Standards for Moving Sources
Title II – Emission Standards for Moving Sources is the portion of the U.S. Clean Air Act that regulates air pollution emissions from mobile sources such as cars, trucks, buses, and other vehicles and engines.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
United Nations Regulation
ⓘ
type-approval regulation ⓘ vehicle noise emission regulation ⓘ |
| addresses |
noise from the exhaust system of vehicles
ⓘ
noise from the intake system of vehicles ⓘ noise from the powertrain of vehicles ⓘ noise from tyres in certain operating conditions ⓘ |
| alsoKnownAs |
R51
NERFINISHED
ⓘ
UNECE Regulation No. 51 NERFINISHED ⓘ |
| appliesTo |
buses
ⓘ
coaches ⓘ heavy commercial vehicles ⓘ light commercial vehicles ⓘ motor vehicles with at least four wheels ⓘ passenger cars ⓘ |
| concerns | A-weighted sound pressure levels ⓘ |
| defines |
maximum permissible sound levels for motor vehicles
ⓘ
microphone positions for noise measurements ⓘ operating conditions for noise tests ⓘ requirements for additional sound reduction devices ⓘ requirements for replacement silencing systems ⓘ test procedures for measuring vehicle exterior noise ⓘ vehicle speeds and gear selection for noise tests ⓘ |
| goal |
facilitation of international trade in motor vehicles
ⓘ
harmonization of vehicle noise limits among contracting parties ⓘ |
| hasRevision |
UN Regulation No. 51.01
NERFINISHED
ⓘ
UN Regulation No. 51.02 NERFINISHED ⓘ UN Regulation No. 51.03 NERFINISHED ⓘ |
| implementedBy | national vehicle type-approval authorities ⓘ |
| includes |
conformity of production requirements for noise
ⓘ
provisions on background noise levels during tests ⓘ provisions on instrumentation accuracy for noise tests ⓘ provisions on test track characteristics ⓘ type-approval procedures for vehicle noise ⓘ |
| jurisdiction | contracting parties to the UNECE 1958 Agreement ⓘ |
| latestSeriesOfAmendments | 03 series of amendments ⓘ |
| legalEffect | type-approval prerequisite in contracting parties to the 1958 Agreement ⓘ |
| measurementUnit |
dB(A)
ⓘ
decibel A-weighted ⓘ |
| partOf | 1958 Agreement NERFINISHED ⓘ |
| purpose |
to limit external noise produced by motor vehicles
ⓘ
to reduce environmental noise pollution from road traffic ⓘ |
| regulatingAuthority |
UNECE World Forum for Harmonization of Vehicle Regulations
NERFINISHED
ⓘ
United Nations Economic Commission for Europe NERFINISHED ⓘ |
| relatedTo |
UN Regulation No. 117 on tyre rolling noise
NERFINISHED
ⓘ
UN Regulation No. 59 on replacement silencing systems NERFINISHED ⓘ |
| requires |
calibrated sound level meters
ⓘ
specific meteorological conditions during tests ⓘ standardized test track surface for noise measurements ⓘ |
| subject | external noise emissions of motor vehicles ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: UN Regulation No. 51 on noise emissions Description of subject: UN Regulation No. 51 on noise emissions is an international vehicle standard that sets limits and test procedures for the external noise produced by motor vehicles to reduce environmental noise pollution.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
United Nations Regulations under the 1958 Agreement
→
contains
→
UN Regulation No. 51 on noise emissions
ⓘ