The refinement of vehicles and rotating machines with respect to Noise and Vibration is central to creating a successful product. Not just making less noise, but also making the "right" noise can be important in the overall success of any manufacturing endeavor.

Using the depth and power of the DATS NVH software suites, it is possible to determine which sources are apposite to the problem.

Any speed, or pulsed signal, can be used by the extensive Tacho Analysis module to analyze the signal in a Waterfall Analysis. This shows the frequency content of signals as the speed changes. The skilled engineer is then able to distinguish quickly between those phenomena that respond at a fixed frequency, such as structural modes of vibration, and the forcing function, which is usually harmonically related to one of the rotating parts of an assembly.

Order Analysis picks out those parts of the spectrum which are harmonically related and displays the data on an order axis, enabling slices and order cuts, which make the location of problematic sources, or frequency coincidences so much easier. As these tests are often carried out on test tracks (in the case of vehicles) no two measurements will be exactly the same.

Waterfall averaging enables the engineer to get a much more consistent view of the problem.

1/nth Octave Analysis is used extensively as a first level method of reducing the amount of data, into standardized bandwidths, which reflect the human response to noise.