Which quantities should be kept separate?
A source sound power level, measured sound pressure level and site receiver limit are different things. Record the metric, operating state and measurement geometry before comparing values.
| Term | Question | Needed basis |
|---|---|---|
| Source emission | What does the set emit? | Manufacturer test data |
| Path treatment | What is installed? | Specialist design |
| Receiver level | What reaches the listener? | Site geometry and prediction |
| Acceptance | How is it checked? | Test plan |
Which measurement sources apply?
ISO 8528-10:2022 addresses generator set airborne noise tests. ISO 3744:2025 addresses sound power determination under specified measurement conditions.
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 attenuation the same as a boundary noise limit?
No. A boundary limit includes propagation and site conditions.
Can attenuation be added across unrelated products?
Not reliably without a system model and consistent frequency and test basis.
Who checks the result?
A qualified acoustic professional should review the prediction and test method.
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