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MetricNoise pollution

Average on-site noise level during specified peak periods

Measurement answer

What this metric measures

Reports the average on-site noise level, in decibels, for each identified peak period, including the noisiest times of day such as periods around sunrise and sunset where applicable.

Specification

Metric specification

Result format
Structured table
Unit
dB — source-defined reporting unit
Reporting basis
Reporting period, with specified peak periods identified.
Aggregation
Average noise level for each reported site and specified peak period; do not aggregate sites with materially different natural characteristics without separate reporting.
Pillar
Environmental
Topic
Noise pollution
Controlled domain
Pollution
Entity type
Metric

Reporting boundary

On-site direct operations at each declared reporting site during the specified peak periods.

Verified source occurrences

Framework coverage

This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.

  • Adopting Disclosure

    TNFD Recommendations

    Source evidence
    Publisher
    Taskforce on Nature-related Financial Disclosures
    Edition
    September 2023
    Requirement
    Not Specified
    Relationship
    Defines Disclosure
    Mapping outcome
    Direct Evidence
    Source locator
    Page 90, Table 8, A2.3
    Open official framework source
  • Adopting Disclosure

    TNFD Recommendations

    50b3aafe095cf2aa76ba
    Publisher
    Taskforce on Nature-related Financial Disclosures
    Edition
    September 2023
    Requirement
    Not Specified
    Relationship
    Maps Source Identity
    Mapping outcome
    Published
    Source locator
    Page 90, Table 8, A2.3
    Open official framework source

Value structure

Dimensions and units

Unit
dB — source-defined reporting unit
Reporting basis
Reporting period, with specified peak periods identified.

Unit meaning: Values use dB under the disclosed TNFD Recommendations method, period, location and reporting boundary.

Table fields and units

  • site
  • geography
  • specified peak period
  • average on-site noise level
  • unit
  • measurement method
  • direct-versus-proxy method

Published dimensions

  • site
  • geography
  • specified peak period
  • business activity
  • reporting period
  • direct-versus-proxy method

Disclosure method

Formula information

Status
Not applicable
Formula type
Structured Disclosure

Disclosure form

No single formula

Report the source-defined result with its stated fields and method disclosures. Annex 2 metric A2.3 identifies an organization-reportable noise-pollution outcome: average on-site decibel level during specified peak periods. It is retained as an optional structured site-level metric because the source does not provide a universal noise measurement or averaging protocol.

Verified sources

Evidence and status sources

Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.

Measurement evidence

  • Measurement evidenceChecked 27 August 2026

    Recommendations of the Taskforce on Nature-related Financial Disclosures

    Publisher
    Taskforce on Nature-related Financial Disclosures
    Edition
    September 2023
    Locator
    Page 90, Table 8, A2.3

    Supports: The official TNFD Recommendations source supports the identity, boundary and method basis of “Average on-site noise level during specified peak periods”.

    Open official source

Use with context

Interpretation boundaries

Method disclosures required

Source-edition basis: Recommendations of the Taskforce on Nature-related Financial Disclosures, September 2023.

  • Definition of the specified peak periods, including whether they include periods around sunrise and sunset.
  • Site boundary and operational activities included in each measurement.
  • Noise measurement method, instrument settings, sampling duration, frequency and time weighting, and averaging approach.
  • Whether values are directly measured or proxied, and material estimation limitations.

Record-specific limitations

  • This is an optional additional metric in TNFD Recommendations Annex 2, not an Annex 1 core global metric.
  • The source specifies an average decibel level but does not prescribe a universal measurement protocol, weighting approach, frequency weighting, time weighting, instrument configuration, or averaging formula.
  • Reported values are only comparable where the organization discloses consistent measurement conditions and peak-period definitions.

Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.

Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.