PULSE Reflex Advanced Processing Type 8703
The advanced processing features of Type 8703 add extra dimensions to both the Time Editor and the Process Chain.
Uses
- Interactive assessment of frequency and/or order characteristics without setting up an analysis
- Basic sound quality listening studies
- Results averaging, for example, multiple runs in a batch analysis process
- Include results average in the analysis process
- Include standard mathematical operations and statistics in the analysis process
Features
- Spectrogram integrated into the time data viewer
- Quick colour contour display of spectra vs.time of selected signals
- Interactive order or frequency slice at cursor location
- Interactive 2D spectrum display at cursor location
- Single-button display optimisation of spectrogram display
- Batch statistics for calculating min, max, or mean of results from multiple recording files
- Calculation operations included in the analysis process
In the Time Editor, the spectrogram display is a means to quickly assess the frequency and order content of selected time data. It is displayed on the same timeline as the time displays for easy correlation of events in both the time and frequency domains. During audio playback the cursors in the spectrogram and time displays are synchronised so, when an interesting sound event is heard, its frequency characteristics can easily be investigated.
2D displays to the left of and underneath the spectrogram show the instantaneous spectrum and frequency slice at the cursor location. When RPM information is available from a tachometer pulse train or RPM profile, an optional order line cursor can be displayed and the slice display becomes an order slice at the cursor location.
While images of these displays can be captured for use in a report, their intended use is for interactive investigation of raw time data before committing to a detailed analysis in the Process Chain.
Cursors in the time and spectrogram displays are synchronised during audio playback to give instant feedback on frequency, order, RPM and amplitude. 2D graphs, projected to the left and bottom of the spectrogram show the instantaneous spectrum and frequency slice.
Type 8703 also adds the possibility to include calculations in the analysis process. This can have many uses, including:
- Calculation of the mean, minimum and maximum of multiples runs from a single test, Batch Statistics
- Post-calculation on analysis results; for example, calculating the mean spectrum from a group of signals
- Performing a series of calculations to, for example, calculate vibration dose value after applying human vibration weighting to recorded acceleration data – as shown in the illustration below
Calculation sequences can be included in the process chain with Type 8703. In this example, a Vibration Dose Value (VDV) calculation, including human vibration weighting, is performed on acceleration time data.
