Delivered-turbine acoustic power by design class
Measurement answer
What this metric measures
Reports average A-weighted sound-power level for turbines delivered during the period by design class. The record applies to wind technology and project developers and keeps its categories, units, period and boundary together.
Specification
Metric specification
- Result format
- Structured table
- Unit
- dB(A) — A-weighted sound-power level
- Reporting basis
- Use the reporting period declared for the result; point-in-time fields use the stated measurement date.
- Aggregation
- Apply the stated formula within each declared category, then aggregate only compatible results with matching populations, periods, boundaries, units and methods.
- Pillar
- Environmental
- Topic
- Living-system and land stewardship
- Controlled domain
- Nature, biodiversity and land
- Entity type
- Metric
Reporting boundary
Use the reporter-declared organizational and operational boundary for wind technology and project developers, including exclusions, estimates and value-chain scope where relevant.
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 DisclosureSource evidence
ISSB/SASB industry-based metrics
- Publisher
- IFRS Foundation / International Sustainability Standards Board
- Edition
- Final taxonomy package published 7 November 2024
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- Record-level correspondence is retained in Sustopedia’s internal source map
- Adopting DisclosureRR-WT-410a.1
ISSB/SASB industry-based metrics
- Publisher
- IFRS Foundation / International Sustainability Standards Board
- Edition
- 2024-11-07
- Requirement
- Not Specified
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- sasb:2024-11-07:RR-WT-410a.1
Value structure
Dimensions and units
- Unit
- dB(A) — A-weighted sound-power level
- Reporting basis
- Use the reporting period declared for the result; point-in-time fields use the stated measurement date.
Unit meaning: Use dB(A) for A-weighted sound-power level; state conversions, scaling and any method-specific normalization applied.
Table fields and units
- Wind-turbine class
- Average delivered-turbine sound-power level (dB(A); A-weighted sound-power level)
Published dimensions
- Wind-turbine class: Class I, Class II, Class III, Class IV, Class S, Other class
- Reporting period or measurement date
- Wind technology and project developers reporting boundary
- Geography or business segment where material
- Measurement method and estimation status
Calculation method
Formula information
- Status
- Specified
- Formula type
- Weighted Average
Formula
L_c = Σ (N_i × L_i) ÷ Σ N_iFor each class, calculate the delivered-unit-weighted mean of model sound-power levels measured under one method.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
N_i | Units of turbine model i delivered | Formula input representing units of turbine model i delivered. | unit |
L_i | A-weighted sound-power level of model i | Formula input representing A-weighted sound-power level of model i. | dB(A) |
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 16 August 2026
Industry-based sustainability disclosure taxonomy
- Publisher
- IFRS Foundation / International Sustainability Standards Board
- Edition
- Final taxonomy package published 7 November 2024
- Locator
- Record-level correspondence is retained in Sustopedia’s internal source map
Supports: The official package establishes the reportable concept and hierarchy position; the public identity, field descriptions and method framing are Sustopedia-authored.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: Sustopedia industry-based measurement profile, 2024 taxonomy-aligned edition (7 November 2024).
- Values for every applicable field: Average delivered-turbine sound-power level.
- Field-level unit, scale, currency or response type where applicable.
- Reporting period or measurement date.
- Organizational, operational and value-chain boundary, including exclusions.
- Estimation, restatement, conversion and method-edition notes.
Record-specific limitations
- Comparisons require compatible populations, periods, boundaries, units, category definitions and measurement methods.
- Scaling, conversion and classification choices can materially change the reported result and must be disclosed.
- The formula is valid only for the stated population, unit basis and category boundary.
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.