NVH measurement chain
A complete NVH setup can include microphones, accelerometers, tachometer or encoder signals, calibrated signal conditioning, synchronized acquisition and analysis software.
- Microphone and acoustic input
- IEPE accelerometers
- Tachometer or rotational reference
- Synchronized multi-channel acquisition
- FFT, octave and order-related analysis
- Test notes and reporting
Common analysis views
The required analysis depends on whether the objective is source identification, product comparison, tonal-noise investigation, structural response or acceptance testing.
- Time history
- FFT spectrum
- 1/1 and 1/3 octave
- Spectrogram
- Order-related analysis
- Cross-channel comparison
SBN and ABN applications
Structure-borne noise focuses on vibration transmitted through the structure. Airborne noise focuses on acoustic radiation and transmission through air. Many product issues require both measurements to understand the complete path.
- Source-path-receiver investigation
- Component comparison
- Cabin or enclosure noise
- Mount and isolation evaluation
- Product validation
Test planning
Repeatable NVH results require defined sensor positions, operating condition, acquisition settings, calibration and test sequence. Quadvion can assist with the measurement workflow and report structure.
- Define test objective
- Select channels and transducers
- Document installation positions
- Set operating condition
- Acquire synchronized records
- Compare and report