NVH-Critical for customer satisfaction & warranty management
Noise (or sound/acoustical), vibration and harshness (NVH) testing is used to test mechanical products, components and sub-assemblies to assure manufactured quality. Analysis methods include time domain, order domain, FFT, Bode and waterfall.
NVH testing catches issues that can affect the performance of the sub-assembly or part over time, creating warranty and recall situations. It also helps to capture problems that can affect the end - user's experience with the finished product, such as engine noise or a noisy transmission in a new car, and impact not only warranties but also customer satisfaction.
Sciemetric NVH Solutions Capture Even the Smallest Defects
NVH testing has been challenging for manufacturing, since most test systems produce inconsistent results and often fail to detect a significant percentage of noise and vibration defects. The application of Sciemetric's signature analysis technology means that even the smallest defects can be caught through our NVH test systems, the 3510 Engine NVH Test System and the 3520 Transmission NVH Test System. We also have sigPOD® NVH, an out-of-the-box sound and vibration monitoring system.
Read the application notes below to see how manufacturers have integrated Sciemetric NVH testing to address their manufacturing quality issues. You may also be interested in this Assembly Magazine article by Sciemetric on Eliminating NVH.
NVH is used in different applications to catch a range of defects.
For example:
| Application |
Examples of Parts |
Typical Defects |
| Rotating Machinery |
Engines, transmissions, electric motors, pumps, compressors, fans, blowers, etc.
|
Missing components, clearance, gear noise, imbalance, misalignment, excessive noise, mis-assembly |
| Resonance Testing |
Brake pads, composite parts, rubber mounts, sintered/fact/forged parts, etc.
|
Cracks, de-lamination, poor bonding, porosity, etc. |
| Motorizes Assemblies |
Sun roofs, electric seats, HVAC Systems, slides, window regulators etc.
|
Noisy motors, defective bearings, imbalance, gear defects, mis-assembly, etc. |
| Machining |
Engine camshafts, transmission and axle gear sets, precision parts, etc.
|
Sub 1 micron surface finish machining errors |
For more information, contact us or download the application notes below