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You can use the SVT Human Vibration Weighting Filter (Fixed Rates) VI, the SVT Human Vibration Weighting Filter (frequency) VI, and the SVT Human Vibration Weighting Filter (octave) VI to apply weighting to human vibration signals in both the time and frequency domains.

Use the SVT Human Vibration Weighting Filter (Fixed Rates) VI to apply weighting to time-domain signals. The following figure shows an example of applying weighting for hand-arm vibration, W_h, to time-domain signals.

In the previous figure, the SVL Scale Voltage to EU VI scales the time-domain signal. The SVT Human Vibration Weighting Filter (Fixed Rates) VI applies a W_h weighting to the scaled signal. The SVL RMS Level VI calculates the vibration level of the weighted signal.

The SVT Human Vibration Weighting Filter (Fixed Rates) VI supports fixed sampling rates when applying weighting to time-domain signals. The following table lists all the supported sampling rates:

Applications	Weighting Filters	Supported Sampling Rates (Hz)
Hand-Arm	Wh	8,000; 10,000; 12,500; 12,800; 16,666.666; 20,000; 25,000; 25,600; 33,333.333; 50,000; 51,200
Whole-Body	Wb, Wc, Wd, We, Wj, Wk, Wm	1,000; 2,000; 3,200; 4,000; 5,000; 6,400; 8,000; 10,000; 12,500; 12,800; 16,666.666; 20,000; 25,000; 25,600; 33,333.333; 50,000; 51,200
Low-Frequency Whole-Body	Wf	1,000; 2,000; 3,200; 4,000; 5,000; 6,400; 8,000; 10,000; 12,500; 12,800

Use the SVT Human Vibration Weighting Filter (frequency) VI and the SVT Human Vibration Weighting Filter (octave) VI to apply weighting to frequency-domain signals.

Use the SVT Human Vibration Weighting Filter (frequency) VI to apply weighting to FFT-based spectra. The following figure shows an example of applying weighting for hand-arm vibration, W_h, to FFT-based spectra.

Use the SVT Human Vibration Weighting Filter (octave) VI to apply weighting to octave spectra. The following figure shows an example of applying weighting for hand-arm vibration, W_h, to octave spectra:

The SVT Octave Spectrum Conversion VI converts the units of the weighted octave spectrum from power to magnitude.

Refer to the SVXMPL_Human Vibration (DAQmx) example VI in the labview\examples\Sound and Vibration\Vibration Level Measurements directory for an example of applying weighting to human vibration signals.