Noise and Vibration Studies
Sound Quality Studies
Noise Source Identification
Sound Power Measurement
Waterfalls and Orders

NVH Starter System

Everything you need to capture and analyze NVH and refinement data

The Prosig NVH Starter System is a complete hardware and software bundle that provides a test engineer with everything needed to capture and analyze noise and vibration data. The Prosig P8004 unit has four 24-bit analog inputs and a dedicated tacho input. Capture speeds of up to 400k samples per second per channel are available.

The DATS.toolbox and DATS NVH software includes data acquisition software to control the P8004 system and a full analysis & reporting package.

Analysis functions are provided for waterfall analysis, order extraction, sound quality metrics, frequency domain processing (FFT, power spectra, etc), digital filtering and much more. Complex multi-channel analysis applications can be easily created using Prosig’s unique Visual Scripting environment.

System includes...

- P8004 4-channel data acquisition system
- DATS Toolbox software
- DATS NVH software package
- 1 x Microphone
- 3 x Uniaxial accelerometers
- 1 x Ignition lead pickup tachometer sensor
- All leads, cables & accelerometer wax

An investigation was made of a sample of automotive components where some were exhibiting a high frequency “tick” or rattle during each operating cycle. This feature could be heard above the normal operating noise. The problem this posed was to measure and analyze components in an objective fashion and classify components as “good” or “bad”.

Removing A-Weighting From Time History Signals

It sometimes occurs that signals are captured with A-weighting applied to the data by the acquisition device. This can be a problem if, for example, you wish to use the data in a hearing test or to use it for a structural vibration analysis.

Aliasing, Orders and Wagon Wheels

These days most people collecting engineering and scientific data digitally have heard of and know of the implications of the sample rate and the highest observable frequency in order to avoid aliasing. For those people who are perhaps unfamiliar with the phenomenon of aliasing then an Appendix is included below which illustrates the phenomenon.

Exhaust Development Using A Prosig P8000 System

The following note describes an application of the Prosig P8000/DATS system in the refinement of an automotive exhaust muffler design for a major after-market exhaust manufacturer in Europe. The particular vehicle under test was required by local legislation to have an overall radiated noise level of less than 70 dB. When tested, the vehicle was found to be producing 71.8 dB of radiated noise. The design of the exhaust system clearly needed to be reviewed and modified.

Visit the Prosig Signal Processing Blog and discover many more articles on the application of signal processing techniques to noise and vibration problems.