What should the acoustic brief contain?
Ask the acoustic specialist to define the measurement and prediction basis. The drafter records that basis and treatment on the drawing.
| Input | Record | Why |
|---|---|---|
| Source | Selected genset noise data | Defines emission |
| Operation | Load and cooling state | Defines condition |
| Receiver | Location and geometry | Defines assessment point |
| Target | Limit and metric | Defines acceptance |
| Treatment | Panel, louver and exhaust inputs | Coordinates the GA |
Which noise standards are relevant?
ISO 8528-10:2022 specifies noise test codes for generator sets. ISO 3744:2025 describes engineering methods to determine sound power from measured sound pressure in specified environments. The acoustic specialist selects the applicable project method.
Sources: International Organization for Standardization: ISO 8528-10:2022, Measurement of airborne noise, International Organization for Standardization: ISO 3744:2025, Determination of sound power levels
Common questions
What else should the bid team know?
Is sound power the same as sound pressure at a site boundary?
No. They are different quantities. The project needs a defined prediction and measurement basis.
Can a generic attenuation claim be used?
No. Performance depends on equipment, geometry, air paths and test conditions.
Who verifies the acoustic design?
A qualified acoustic professional verifies predictions and acceptance criteria.
Primary sources
- Application Manual: Liquid Cooled Generator Sets, ventilation chapterCummins
- Ambient Capability of Enclosed Generator SetsCaterpillar
- ISO 8528-10:2022, Measurement of airborne noiseInternational Organization for Standardization
- ISO 3744:2025, Determination of sound power levelsInternational Organization for Standardization